Perhaps you should try some spelling variations:
chiet tach » chieu sach
trung pham » tung pham, trung phat, truong phan
trung phan » trung thanh, trung ha, dung phan
cong thanh » dong thanh, cong trinh, truong thanh
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong ty
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: ho chiet tach - thanh ((trung pham) OR (trung phan)) trong ((cong tan) OR (cong thanh)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((trung pham) or (trung phan)) trong ((cong tan) OR (cong thanh)) than cau~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung pham) or (trung phan)) trong ((cong tan) OR (cong thanh)) than cau*.