Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trung cam » trung tam, trung cap, trung ca
trung nam » trung tam, trong nam, trung cap
hung cong » nhung cong, hung cuong, phung cong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh ((trung cam) OR (trung nam)) hung cong tan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((trung cam) OR (trung nam)) hung cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung cam) OR (trung nam)) hung cong tan than cau*.