Perhaps you should try some spelling variations:
hieu nghe » lieu nghe, hiem ngheo, nhiem nghe
nghe nam » nghe lam, nghiep nam, nghe nano
nam thuc » nam thuoc, am thuc, nam thu
dung sai » dung tai, dung va, dung dat
danh sai » danh bat, danh dau, hanh san
thuc xa » thuc xay, tuc xa, thuc va
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
ma hoi » mai hoi, xa hoi, ma hoa
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky tang) OR (ky dang)) ma hoi. hieu nghe nam thuc xa ((danh sai) or (dung sai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (ky dang)) ma hoi. hieu nghe nam thuc xa ((danh sai) OR (dung sai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky tang) OR (ky dang)) ma hoi. hieu nghe nam thuc xa ((danh sai) or (dung sai)) cua tre*".