Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
cham thu » cam thu, nham thu, pham thu
ban hang » ngan hang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
thu ban » thu hang
vu cao » cu cao, va cao
va cua » va chua, via cua, ca cua
va cau » van cau, va cac, va dau

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: vu cao ky nang mai hoi. hieu ve cham thu ban hang ((va cua) OR (va cau)) tre~.
• Adding a wildcard symbol may retrieve word variants: vu cao ky nang mai hoi. hieu ve cham thu ban hang ((va cua) or (va cau)) tre*.