Perhaps you should try some spelling variations:
ban hang » ngan hang
cac kho » cac khoi, cac khoa, cac khu
cham so » cham soc, cham o, ham so
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
tang xa » trang xa, tang ma, tang ha
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac kho ((tang xa) OR (lang xa)) hoi. hieu va cham so ((ban hanh) or (ban hang)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac kho ((tang xa) OR (lang xa)) hoi. hieu va cham so ((ban hanh) OR (ban hang)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac kho ((tang xa) OR (lang xa)) hoi. hieu va cham so ((ban hanh) or (ban hang)) vi cua tre*".