Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trung cam » trung tam, trung cap, trung nam
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
cao cap » cao chat
ca cap » cac cap, ca cac, ca cao

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: theo chieu sach - thanh trung cam nang ((cong dan) OR (cong tan)) ((ca cap) OR (cao cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh trung cam nang ((cong dan) or (cong tan)) ((ca cap) OR (cao cap))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung cam nang ((cong dan) or (cong tan)) ((ca cap) OR (cao cap))*.