Perhaps you should try some spelling variations:
kho tang » cao tang
ban hanh » ban hang
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
tu bai » tu ban, tu bat, te bai
ma hoi » mai hoi, xa hoi, ma hoa
ca cua » co cua

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

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