Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thanh » dong thanh, cong trinh, cong tan
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - thanh trung cua dung ((cong dan) or (cong thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - thanh trung cua dung ((cong dan) OR (cong thanh)) toan ban.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - thanh trung cua dung ((cong dan) or (cong thanh)) toan ban*.