Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac tac » cac toc, cac bac, cac dac
tac van » tac vang, cac van, tac va
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: su sach ky lang xa hoi. ((hieu viec) OR (hieu ve)) cac tac van hanh vi va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. ((hieu viec) OR (hieu ve)) cac tac van hanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. ((hieu viec) OR (hieu ve)) cac tac van hanh vi va triet*.