Perhaps you should try some spelling variations:
nphan dang » nhan dang, nhan dan, phan dong
hieu lang » chieu sang, hieu quang, nhieu tang
phan dang » phan dau, phan cong, nhan dan
van dung » van dong, xay dung, tin dung
dung dat » dung va, dung tai
co hieu » cao hieu, doc hieu
dat van » dao van, dat va, dam van
van phi » van chi, van phu, van nhi
phi dau » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: co hieu lang - ((phan dang) or (nphan dang)) van dung dat van phi dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co hieu lang - ((phan dang) OR (nphan dang)) van dung dat van phi dau.
• Adding a wildcard symbol may retrieve word variants: co hieu lang - ((phan dang) or (nphan dang)) van dung dat van phi dau*.