Perhaps you should try some spelling variations:
thang cong » thanh cong, thang long, thong cong
thanh phan » thanh pho, thanh san, thanh toan
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dang » hanh dong, anh dang, hanh dung
van thang » van thanh, van khang, van hang
tan thanh » tran thanh, tang thanh, toan thanh
hieu van » hieu va, thien van, lieu va
dang van » hoang van, hang va
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu van) or (hieu lang)) - hanh dang van thang cong tan thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu van) OR (hieu lang)) - hanh dang van thang cong tan thanh phan*.