Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hieu quan » hieu qua, lieu quan, thien quan
cua nhung » va nhung
anh dang » anh dong, anh dung, anh bang
dang cua » dung cua, dong cua, mang cua
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu lang) or (hieu quan)) - anh dang cua nhung ((cong tan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (hieu quan)) - anh dang cua nhung ((cong tan) OR (cong san)) toan ban.
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) or (hieu quan)) - anh dang cua nhung ((cong tan) or (cong san)) toan ban*.