Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
tung van » trung van, tang van, dung van
cong dan » cong san, cong tan, cong dong
thai cao » thoai cac, thuat cao, toan cao
ho hieu » ho chieu, hoi hieu, nho hieu
tai cao » tao cao, tai sao, tai cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh tung van ban ((cong dan) or (huong dan)) ((thai cao) or (tai cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh tung van ban ((cong dan) OR (huong dan)) ((thai cao) OR (tai cao)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tung van ban ((cong dan) or (huong dan)) ((thai cao) or (tai cao))*.