Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trung va » truong va, trang va, trung ha
cong san » cong tac
cong tan » cong tac, cong thanh, cong ty
than cap » khan cap, thanh lap, thanh cac

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 trung va nhung ((((cong san) OR (cong dong))) OR (cong tan)) than cap~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh trung va nhung ((((cong san) or (cong dong))) or (cong tan)) than cap*.