Perhaps you should try some spelling variations:
thanh thanh » nhanh thanh, thanh toan, thanh phan
thanh thang » nhanh thang, thanh hang, thanh toan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
co sach » bo sach, cuon sach, hoc sach
ap dung » xay dung, van dung
can cau » van cau, ban cau, ca cau
doi co » doi bo, moi co, hoi co

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

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