Perhaps you should try some spelling variations:
qua than » qua thanh, qua phan, qua tan
hang vai » hang va, hang tai, hang hai
ban hang » ngan hang
than soc » than doc, than hoc, than so
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
tang ha » tang ma, trung ha, tang van
soc ban » hoc ban, coc ban, so ban
lang ha » long ha
te cac » tu cac, te cao, de cac
ve cac » va cac, vien cac

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