Perhaps you should try some spelling variations:
ban hanh » ban hang
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
ma hoi » mai hoi, xa hoi, me hoi
cham o » cham soc
vi cua » vai cua
di cua » dai cua, doi cua, de cua
o ban » co ban, lo ban, do ban

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 (ma hoa)). hieu ve cham o ban hanh ((vi cua) OR (di cua)) tre~.
• Adding a wildcard symbol may retrieve word variants: tu cac ky tang ((ma hoi) or (ma hoa)). hieu ve cham o ban hanh ((vi cua) or (di cua)) tre*.