Perhaps you should try some spelling variations:
qua thanh » quan thanh, cua thanh, qua than
ban hang » ngan hang
qua tham » qua cham, qua than, quan pham
soc ban » hoc ban, coc ban, so ban
ky tang » ky nang, ky dang, kho tang
tang ha » lang ha, tang ma, trung ha
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » vai cua
di cua » dai cua, doi cua, de 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 hoi. hieu ((qua tham) OR (qua thanh)) soc ban hang ((vi cua) OR (di cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky tang ha hoi. hieu ((qua tham) OR (qua thanh)) soc ban hang ((vi cua) or (di cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: te cac ky tang ha hoi. hieu ((qua tham) OR (qua thanh)) soc ban hang ((vi cua) or (di cua)) tre*.