Black-browed reed warbler
Schrenk's Reed Warbler 
(Chích đầu nhọn mày đen, Acrocephalus bistrigiceps)

The black-browed reed warbler (Acrocephalus bistrigiceps) is a marsh-warbler in the family Acrocephalidae.

Acrocephalidae: from the name of the genus Acrocephalus from Ancient Greek akros, "highest", and kephale, "head". 
It is possible that the Naumanns thought akros meant "sharp-pointed".