Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
hanh nang » anh nang, ganh nang, hanh mang
cao nhung » cho nhung, cam nhung, cao chung
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van
van tap » van tai, van tan, han tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (hieu lang)) - hanh nang cao nhung cong tan van tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu lang)) - hanh nang cao nhung cong tan van tap.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu lang)) - hanh nang cao nhung cong tan van tap*.