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
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
tung ap » tang ap, tung dan, tung bay
ap dung » xay dung, van dung
can cau » van cau, ban cau, ca cau

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 ap dung ((cong dan) or (cong tan)) can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - thanh tung ap dung ((cong dan) OR (cong tan)) can cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - thanh tung ap dung ((cong dan) or (cong tan)) can cau*.