Perhaps you should try some spelling variations:
than soc » than hoc, thanh son, nhanh soc
ban hang » ngan hang
hang vai » hang va, hang tai, hang hai
ky tang » ky nang, ky dang, kho tang
tang ha » lang ha, tang ma, trung ha
than so » than sao, than vo, than go
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
ha hoi » hoa hoi, ha noi, xa hoi

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 ha hoi. hieu qua ((((than soc) OR (than so))) OR (than doc)) ban hang vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky tang ha hoi. hieu qua ((((than soc) OR (than so))) or (than doc)) ban hang vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te cac ky tang ha hoi. hieu qua ((((than soc) OR (than so))) or (than doc)) ban hang vai cua tre*.