Perhaps you should try some spelling variations:
qua than » qua thanh, qua phan, qua tan
ban hang » ngan hang
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
qua hai » qua hoat
soc ban » hoc ban, coc ban, so ban
hang vi » hang va, hanh vi, hang di
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky tang ma hoi. hieu ((qua hai) OR (qua than)) soc ban hang vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: te cac ky tang ma hoi. hieu ((qua hai) or (qua than)) soc ban hang vi cua tre*.