Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
nang tay » nang tai, nang tao, bang tay
cau phuc » cau truc, chau phu, huu phuc
ve triet » va trien, su triet
tay hoi » tay ho, tao hoi, tay thai
cau luc » cau truc
va hanh » van hanh, va thanh, va danh
vi ve » va ve, gi ve, ve ve

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 ky nang tay hoi. hieu qua ((cau luc) OR (cau phuc)) va hanh vi ve triet~.
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang tay hoi. hieu qua ((cau luc) or (cau phuc)) va hanh vi ve triet*.