Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
eu cac » tu cac, su cac, vu cac
su can » su van, su cao, tu can
tuc va » thuc va, truc va, tuc xa
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((eu cac) or (su can)) ky nang xa hoi. hieu vien cac tuc va hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((eu cac) OR (su can)) ky nang xa hoi. hieu vien cac tuc va hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: ((eu cac) or (su can)) ky nang xa hoi. hieu vien cac tuc va hanh vi va triet*.