Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
hieu van » hieu va, thien van, hieu ve
hai truc » dai truc, hai trac, hang truc
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
va hanh » va thanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ky nang xa hoi. ((hieu van) OR (lieu va)) hai truc ((va hanh) or (van hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang xa hoi. ((hieu van) OR (lieu va)) hai truc ((va hanh) OR (van hanh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky nang xa hoi. ((hieu van) OR (lieu va)) hai truc ((va hanh) or (van hanh)) vi cua tre*".