Perhaps you should try some spelling variations:
qua than » qua thanh, qua phan, qua tan
than soc » than doc, than hoc, than so
soc ngan » so ngan, boc ngan, hoc nganh
ky tang » ky nang, ky dang, kho tang
tang ha » lang ha, tang ma, trung ha
te cac » tu cac, ve cac, de cac
te cao » te bao
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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