Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
hieu quan » hieu qua, lieu quan, thien quan
tinh cua » trinh cua, sinh cua, tranh cua
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: hoi ((hieu lang) or (hieu quan)) - hanh ((tinh cua) or (tinh chat)) nhung cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((hieu lang) OR (hieu quan)) - hanh ((tinh cua) OR (tinh chat)) nhung cong dan than cap.
• Adding a wildcard symbol may retrieve word variants: hoi ((hieu lang) or (hieu quan)) - hanh ((tinh cua) or (tinh chat)) nhung cong dan than cap*.