Perhaps you should try some spelling variations:
dung sai » dung tai, dung va, dung dat
danh sai » danh bat, danh dau, hanh san
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
hieu he » hieu ve, hiem he, hieu le
thuc xa » thuc xay, tuc xa, thuc va
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, me hoi
he nam » ha nam, nghe nam

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 ((ma hoi) OR (ma hoa)). hieu he 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 ((ma hoi) OR (ma hoa)). hieu he 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 ((ma hoi) OR (ma hoa)). hieu he nam thuc xa ((danh sai) or (dung sai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang ((ma hoi) OR (ma hoa)). hieu he nam thuc xa ((danh sai) or (dung sai)) cua tre*.