Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
hieu quan » hieu qua, lieu quan, thien quan
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((nhieu tang) or (hieu quan)) - hanh ((tang cua) or (tranh cua)) hang cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((nhieu tang) OR (hieu quan)) - hanh ((tang cua) OR (tranh cua)) hang cong dan than cap.
• Adding a wildcard symbol may retrieve word variants: doi ((nhieu tang) or (hieu quan)) - hanh ((tang cua) or (tranh cua)) hang cong dan than cap*.