Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
dien viet » tieng viet, trien viet, gian viet
van hanh » van thanh, ban hanh, van anh
cac toc » cac toi, cac nuoc, cac thoi
toc van » hoc van, toc san, tac van
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
vu sac » vu sach, vu san, va sac
vi ve » gi ve, ve ve, vi he
va ve » va de, va le, va vi

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

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