Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tung quan » tuong quan, trung quan, tong quan
dung quan » dung quang, dung luan, luong quan
cong cong » cong dong, trong cong, dung cong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac

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

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