Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
khang cong » hang cong, thanh cong, dang cong
hanh tang » hanh trang, anh tang, hanh mang
van khang » van khanh, van thanh, van quang
tan thanh » tran thanh, tang thanh, toan thanh
thanh cha » thanh ha, thanh nha, thanh phan
hieu cac » hieu luc, hieu va, hieu van
tang van » dang van, hoang van, trong van
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu cac) or (chieu sach)) - hanh tang van khang cong tan thanh cha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu cac) OR (chieu sach)) - hanh tang van khang cong tan thanh cha*.