Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
nhung cong » dung cong, thong cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
nha hieu » nha dieu, nghe hieu, phan hieu
tran van » luan van
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: nha hieu lang - thanh tran van ((nhung cong) or (hang cong)) dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nha hieu lang - thanh tran van ((nhung cong) OR (hang cong)) dan than tap.
• Adding a wildcard symbol may retrieve word variants: nha hieu lang - thanh tran van ((nhung cong) or (hang cong)) dan than tap*.