Perhaps you should try some spelling variations:
qua than » qua thanh, qua phan, qua tan
ky trung » ky trong, ki trung, ly trung
trung ha » trung hoc, trung tam, trung cap
ban hang » ngan hang
qua cham » qua hai, qua cac, va cham
cua tre » cua te, cuu tre, cua triet
hang vi » hang va, hanh vi, hang di
soc ban » hoc ban, coc ban, so ban
vi cua » vai cua, di cua
te cac » tu cac, te cao, de cac
ha hoi » hoa hoi, ha noi, xa hoi
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 trung ha hoi. hieu ((qua cham) OR (qua than)) soc ban hang vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) OR (ve cac)) ky trung ha hoi. hieu ((qua cham) or (qua than)) soc ban hang vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((te cac) OR (ve cac)) ky trung ha hoi. hieu ((qua cham) or (qua than)) soc ban hang vi cua tre*.