Perhaps you should try some spelling variations:
ban hang » ngan hang
ky tang » ky nang, ky dang, kho tang
cua tre » cuu tre, cua triet, dua tren
hang vi » hang va, hanh vi, hang di
cham so » cham soc, cham o, ham so
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
so ban » sao ban, so bang, co ban
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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 cac ky tang ((ma hoi) OR (mai hoi)). hieu ve cham so ban hang vi ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky tang ((ma hoi) OR (mai hoi)). hieu ve cham so ban hang vi ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: tu cac ky tang ((ma hoi) OR (mai hoi)). hieu ve cham so ban hang vi ((cua tre) or (cua te))*.