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Actitis is a small genus of waders, comprising just two very similar bird species.
The genus name is from Ancient Greek aktites, "coast-dweller" from akte, "coast".

1/ Common sandpiper (Choắt nhỏ, Actitis hypoleucos)

Arenaria, commonly known as turnstone, is a genus of birds in the wader family Scolopacidae, containing only two species.
The genus name arenaria is from Latin arenarius, "inhabiting sand", from arena, "sand".

1/ Ruddy turnstone (Rẽ khoang, Arenaria interpres)
The specific epithet interpres means "messenger".

Calidris is a genus of Arctic-breeding, strongly migratory wading birds in the family Scolopacidae. 
The genus name is from Ancient Greek kalidris or skalidris, a term used by Aristotle for some grey-coloured waterside birds.

1/ Spoon-billed sandpiper (Rẽ mỏ thìa, Calidris pygmaea)

2/ Curlew sandpiper (Rẽ bụng nâu, Calidris ferruginea)
The specific ferruginea is from Latin ferrugo, ferruginis, "iron rust" referring to its colour in breeding plumage.

3/ Red-necked stint (Rẽ cổ hung, Calidris ruficollis) 
The specific ruficollis is from Latin rufus, "red" and collum, "neck".

4/ Sanderling (Rẽ cổ xám, Calidris alba) 
The name derives from Old English sand-yrðling, "sand-ploughman".
The specific, alba, is Latin for "white".

5/ Sharp-tailed sandpiper (Rẽ đuôi nhọn, Calidris acuminata)
The specific acuminata is from Latin acuminatus, 'sharp, pointed'.

6/ Ruff (Rẽ lớn, Calidris pugnax)
formerly placed in different genera and was known as: Tringa pugnax, Philomachus pugnax
The specific epithet refers to the aggressive behaviour of the bird at its mating arenas — pugnax from the Latin term for "combative".

7/ Great knot (Rẽ lớn ngực đốm, Calidris tenuirostris)
The specific tenuirostris is from Latin tenuis "slender" and rostrum "bill".

8/ Temminck's stint (Rẽ Lưng đen, Calidris temminckii)
The specific epithet is from the name of a Dutch naturalist Coenraad Jacob Temminck.

9/ Red knot or just knot (Rẽ lưng nâu, Calidris canutus)

10/ Broad-billed sandpiper (Rẽ mỏ rộng, Calidris falcinellus)
The specific name falcinella is from falx, falcis, "a sickle. 
Some research suggests that it should rather go into the genus Philomachus.

11/ Long-toed stint (Rẽ ngón dài, Calidris subminuta) 
The specific subminuta is from Latin sub, "near to" and minuta, "small" from its similarity to the little stint, Calidris minuta.

12/ Little stint (Rẽ nhỏ, Calidris minuta or Erolia minuta)
The specific minuta is Latin for "small.

13/ Dunlin (Rẽ trán trắng, Calidris alpina)
formerly placed in the genus Erolia.
The specific alpina is from Latin and means "of high mountains", in this case referring to the Alps.
The English name derives from dun, "dull brown", with the suffix -ling, meaning a person or thing with the given quality.

Gallinago is a genus of birds in the wader family Scolopacidae, containing 18 species.
The scientific name gallinago is Neo-Latin for a woodcock or snipe from Latin gallina, "hen" and the suffix -ago, "resembling".

1/ Swinhoe's snipe, (Dẽ giun Swinhoe, Gallinago megala), also known as forest snipe or Chinese snipe

2/ Common snipe (Rẽ giun, Gallinago gallinago)

3/ Pin-tailed snipe or pintail snipe (Rẽ giun Á châu, Gallinago stenura)

4/ Wood snipe (Rẽ giun lớn, Gallinago nemoricola)

Limnodromus is a genus of waders commonly known as dowitchers. The name combines the Ancient Greek limne meaning "marsh" with -dromos meaning "-racer" or "-runner".

1/ Asian dowitcher (Choắt chân màng lớn, Limnodromus semipalmatus)

Limosa is a genus of bird in the family Scolopacidae belonging to the order Charadriiformes.
The genus is commonly known as the gotwit comprising large, long-billed, long-legged and strongly migratory waders of the bird.
The godwits can be distinguished from the curlews by their straight or slightly upturned bills, and from the dowitchers by their longer legs. 
The genus name Limosa is from Latin and means "muddy", from limus, "mud". The English name "godwit" is believed to imitate the bird's call.

1/ Black-tailed godwit (Choắt mỏ thẳng đuôi đen, Limosa limosa) 
2/ Bar-tailed godwit (Choắt mỏ thẳng đuôi vằn, Limosa lapponica)
The specific name lapponica refers to Lapland.

Lymnocryptes is a genus of birds in the wader family Scolopacidae, containing only one species: Lymnocryptes minimus.

1/ Jack snipe or jacksnipe (Rẽ giun nhỏ, Lymnocryptes minimus)
The genus name Lymnocryptes is from Ancient Greek limne, "marsh" and kruptos, "hidden". The species name minimus is from Latin and means "smallest".

Numenius is a bird genus commonly known as curlews which are characterised by their long, slender, downcurved bills and mottled brown plumage.
The English name may have been influenced by the Old French corliu, "messenger", from courir , "to run".

The genus name Numenius is from Ancient Greek noumenios, a bird mentioned by Hesychius. It is associated with the curlews because it appears to be derived from neos, "new" and mene "moon", referring to the crescent-shaped bill.

1/ Eurasian or common whimbrel (Choắt mỏ cong bé, Numenius phaeopus), also known as the white-rumped whimbrel 
formerly Scolopax phaeopus.
2/ Far Eastern curlew (Choắt mỏ cong hông nâu, Rẽ mỏ cong hông nâu, Numenius madagascariensis)
3/ Eurasian curlew or common curlew (Choắt mỏ cong lớn, Numenius arquata)
 The species name arquata is the Medieval Latin name for this bird, derived from Latin arcuatus, "bow-shaped", referring to the shape of the bill.

Phalaropus is a genus of birds commonly known as phalarope.
The English and genus names come through French phalarope and scientific Latin Phalaropus from Ancient Greek phalaris, "coot", and pous, "foot". 
Coots and phalaropes both have lobed toes.

1/ Red-necked phalarope (Dẽ cổ đỏ, Rẽ cổ đỏ, Phalaropus lobatus), also known as the northern phalarope and hyperborean phalarope

Scolopacidae is a large family of shorebirds, or waders, which mainly includes many species known as sandpipers, but also others such as curlews and snipes.

Scolopax, commonly known as woodcock, is a genus of wading birds in the family Scolopacidae.
The genus name is Latin for a snipe or woodcock.

1/  Eurasian woodcock (Rẽ gà , Nhát bà, Scolopax rusticola)
The specific epithet rusticola is the Latin name of a gamebird which was possibly a grouse.

Tringa is a genus of waders, containing the shanks and tattlers. The name Tringa is the Neo-Latin name given to the green sandpiper based on Ancient Greek trungas, a thrush-sized, white-rumped, tail-bobbing wading bird mentioned by Aristotle.

1/ Green sandpiper (Choắt bụng trắng, Tringa ochropus)
2/ Wood sandpiper (Choắt bụng xám, Tringa glareola)
The specific epithet glareola is from Latin glarea, " gravel".
3/ Spotted redshank (Choắt chân đỏ, Tringa erythropus)
The specific erythropus is from Ancient Greek eruthros, "red", and pous, "foot".
4/ Marsh sandpiper (Choắt đốm đen, Tringa stagnatilis)
The specific epithet stagnatilis is from Latin stagnum, "swamp".
5/ Common greenshank (Choắt lớn, Tringa nebularia)
The specific nebularia is from Latin nebula "mist". 
6/ Nordmann's greenshank (Choắt lớn mỏ vàng, Tringa guttifer) or the spotted greenshank
7/ Grey-tailed tattler (Choắt lùn đuôi xám, Tringa brevipes), also known as the Siberian tattler or Polynesian tattler,
formerly Heteroscelus brevipes.
The specific brevipes is from Latin brevis, "short", and pes, "foot".

Xenus is a genus of waders containing only one member, Terek sandpiper (Xenus cinereus).

1/ Terek sandpiper (Choắt chân màng bé, Xenus cinereus) 
It is named after the Terek River which flows into the west of the Caspian Sea where it was first observed.
The genus name Xenus is from Ancient Greek xenos meaning "stranger"; the specific epithet cinereus is Latin for "ash-grey" from cinis, cineris, "ashes".