Perhaps you should try some spelling variations:
hieu vien » hieu hien, thieu nien, hieu tieng
hieu viec » nhieu viec, hieu ve, sieu viet
van hanh » van thanh, ban hanh, van anh
ve triet » va trien, su triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hoc van » hoc dan, hoc va, hoc vat
da hoc » dai hoc, dan hoc, day hoc
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: su sach ky nang xa hoi. ((hieu vien) OR (hieu viec)) da hoc van hanh vi ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((hieu vien) OR (hieu viec)) da hoc van hanh vi ve triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu vien) OR (hieu viec)) da hoc van hanh vi ve triet*.