Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu sach » hieu cach, dien sach, hieu cac
manh dung » manh hung, manh tung, anh dung
hang cong » dang cong, hang nong, bang cong
dung cua » dung luan, dung cho
cua hang » cua dang, cua nhung, cua cong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sach) or (chieu sach)) - manh dung cua hang cong tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (chieu sach)) - manh dung cua hang cong tan than cao.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) or (chieu sach)) - manh dung cua hang cong tan than cao*.