Perhaps you should try some spelling variations:
ban hang » ngan hang
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
cau luc » cau truc, cau phuc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va cau » van cau, va cac, va dau
sai ky » sac ky
te sai » te tai, te bai, te lai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky lang xa hoi. hieu va cau luc ((ban hanh) or (ban hang)) de ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky lang xa hoi. hieu va cau luc ((ban hanh) OR (ban hang)) de ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sai ky lang xa hoi. hieu va cau luc ((ban hanh) or (ban hang)) de ((cua tre) or (cuu tre))*.