Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua tre » cua te, cuu tre, cua triet
cac xuc » cam xuc, cac nuoc, chat xuc
qua cac » cua cac
ky sang » ky nang, ky dang, ky tang
sai ky » sac ky
ma hoi » mai hoi, xa hoi, me hoi
va dan » ca dan, va dao, va dau
ca cua » co cua
tu sai » tu bai, tu san, tu cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky sang ((ma hoi) or (ma hoa)). hieu qua cac xuc ((va dan) or (ban thanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky sang ((ma hoi) OR (ma hoa)). hieu qua cac xuc ((va dan) OR (ban thanh)) ca cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky sang ((ma hoi) or (ma hoa)). hieu qua cac xuc ((va dan) or (ban thanh)) ca cua tre*.