Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
thang lang » thang long, thuong lang, nhanh lang
hieu lang » chieu sang, hieu quang, hieu van
dang cong » dung cong
lang van » dang van, tang van, hoang van
van dang » van dong, van dung, van nang
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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

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