Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
vi cua » vai cua, di cua

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 xa hoi. ((hieu ve) OR (hieu qua)) pham duc van hanh vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang xa hoi. ((hieu ve) or (hieu qua)) pham duc van hanh vi cua triet*.