Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu
tung va » trung va, tuong va, dung va

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 va nhung cong tan ((((toan cao) or (toan tap))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh tung va nhung cong tan ((((toan cao) OR (toan tap))) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tung va nhung cong tan ((((toan cao) or (toan tap))) or (toan ban))*.