Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh phan » thanh pho, thanh san, thanh toan
hanh dung » thanh dung, anh dung, hanh dong
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
tan thanh » tran thanh, tang thanh, toan thanh
hieu cac » hieu luc, hieu va, hieu 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 dung luan dung cong tan thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu cac) OR (chieu sach)) - hanh dung luan dung cong tan thanh phan*.