Great reed warbler 
(Chích sậy lớn, Acrocephalus arundinaceus)

The great reed warbler (Acrocephalus arundinaceus) is an insectivorous bird in the family Acrocephalidae.

The family is 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".
The Latin word arundinaceus (and its variant harundinaceus) means "resembling a reed" or "reed-like", derived from the Latin word arundo (or harundo), meaning "reed" or "cane", and the suffix -aceus, meaning "resembling" or "belonging to".