Perhaps you should try some spelling variations:
thanh tung » thanh cong
hanh nhung » anh nhung, canh nhung, doanh nhung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
tung hanh » tung thanh, tung hinh, tung manh
cong san » cong tac
ho hieu » ho chieu, hoi hieu, nho hieu

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