Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
hieu van » hieu va, thien van, lieu va
van lam » van nam
xuc van » duc van, luc van, xuc ban
vuc van » duc van, luc van, thuc van
ly nang » ky nang, ly hang, ly vang
ca viet » va viet, co viet, hoa viet
ma hoi » mai hoi, xa hoi, ma hoa
vi ca » vit ca, li ca, va ca

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 khach ((ly nang) OR (ty xang)) ma hoi. hieu van lam ((xuc van) OR (vuc van)) hanh vi ca viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ((ly nang) or (ty xang)) ma hoi. hieu van lam ((xuc van) OR (vuc van)) hanh vi ca viet~".
• Adding a wildcard symbol may retrieve word variants: vu khach ((ly nang) or (ty xang)) ma hoi. hieu van lam ((xuc van) OR (vuc van)) hanh vi ca viet*.