Perhaps you should try some spelling variations:
ban hang » ngan hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
te bai » te bao, te tai, te ban
bai ky » ban ky, sai ky, bac ky
ve cau » ke cau, va cau, ve 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 bai ky nang xa hoi. hieu ve cau truc ((ban hanh) OR (ban hang)) de ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te bai ky nang xa hoi. hieu ve cau truc ((ban hanh) OR (ban hang)) de ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: te bai ky nang xa hoi. hieu ve cau truc ((ban hanh) OR (ban hang)) de ((cua tre) or (cuu tre))*.