Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
vien cac » vien bach, vien dai, gian cac
nang xa » nang x, lang xa, nang ma
vien da » vien dai, hien dai
va hanh » van hanh, va thanh, va danh
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 ((vien cac) OR (vien da)) xuc ((va hanh) or (gia thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang xa hoi. hieu ((vien cac) OR (vien da)) xuc ((va hanh) OR (gia thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky nang xa hoi. hieu ((vien cac) OR (vien da)) xuc ((va hanh) or (gia thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang xa hoi. hieu ((vien cac) OR (vien da)) xuc ((va hanh) or (gia thanh)) vi cua tre*.