Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu sach » chieu sach, hieu cach, dien sach
doc hieu » toc thieu, hoc thieu, hoc hien
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
than cau » toan cau, phan cau, thanh chau
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: doc hieu sach - thanh tung cua dung ((cong tan) OR (cong tac)) ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - thanh tung cua dung ((cong tan) OR (cong tac)) ((than cau) OR (than cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sach - thanh tung cua dung ((cong tan) OR (cong tac)) ((than cau) or (than cap))".
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - thanh tung cua dung ((cong tan) OR (cong tac)) ((than cau) or (than cap))*.