Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
ban hang » ngan hang
nang xa » nang x, lang xa, mang xa
vai cau » va cau, van cau, vai cac
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ve cac » va cac, vien 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: tu san ky ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc ((ban hanh) OR (ban hang)) vai cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc ((ban hanh) or (ban hang)) vai cau tren~".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc ((ban hanh) or (ban hang)) vai cau tren*.