Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
ve triet » va trien, su triet
vu hanh » vu khanh, vu thanh, du hanh
hanh ky » hanh kem
nang xa » nang x, lang xa, nang ma
toc van » hoc van, toc san, oc van
tac van » tac vang, cac van, tac 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 hanh ky nang xa hoi. hieu vien cac ((toc van) or (tac van)) hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu hanh ky nang xa hoi. hieu vien cac ((toc van) OR (tac van)) hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: vu hanh ky nang xa hoi. hieu vien cac ((toc van) or (tac van)) hanh vi ve triet*.