Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
vien cac » vien bach, vien dai, vien da
ve triet » va trien, su triet
nang xa » nang x, lang xa, nang ma
toc van » hoc van, toc san, oc van
tac van » tac vang, cac van, tac can
tac va » tac da, tac xa, tuc va
vi ve » va ve, gi ve, ve ve

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 ((toc van) or (((tac van) OR (tac va)))) hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang xa hoi. hieu vien cac ((toc van) OR (((tac van) OR (tac va)))) hanh vi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky nang xa hoi. hieu vien cac ((toc van) or (((tac van) OR (tac va)))) hanh vi ve triet".
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang xa hoi. hieu vien cac ((toc van) or (((tac van) OR (tac va)))) hanh vi ve triet*.