Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
tung cua » trung cua, tuong cua, dung cua
cua nong » cua cong, cuu nong, cua dong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, than cap

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 chieu sach - thanh tung cua nong ((cong dan) OR (cong tan)) than cau~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh tung cua nong ((cong dan) or (cong tan)) than cau*.