Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
hieu lang » chieu sang, hieu quang, nhieu tang
hieu quan » hieu qua, lieu quan, thien quan
cua nhung » va nhung
duong van » duong va, luong va, dang van
hieu van » hieu va, thien van, lieu va
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
van than » van thanh, van thang, van tuan
than cap » khan cap, thanh lap, thanh cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (((hieu van) OR (hieu quan)))) - anh dung cua nhung duong van than cap~.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (((hieu van) or (hieu quan)))) - anh dung cua nhung duong van than cap*.