Perhaps you should try some spelling variations:
trung ha » trung hoc, trung tam, trung cap
qua cham » qua hai, qua cac, va cham
ban hang » ngan hang
qua than » qua thanh, qua phan, qua tan
cua tre » cua te, cuu tre, cua triet
soc ban » hoc ban, coc ban, so ban
tang ha » lang ha, tang ma, tang van
hang vi » hang va, hanh vi, hang di
vi cua » vai cua, di cua
te cac » tu cac, ve cac, te cao

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) OR (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 ky ((tang ha) OR (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 ky ((tang ha) OR (trung ha)) hoi. hieu ((qua cham) or (qua than)) soc ban hang vi cua tre*.