Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
van hanh » van thanh, ban hanh, van ban
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
cac tac » cac toc, cac bac, cac dac
van anh » van thanh, tuan anh, van minh
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 cac tac ((van hanh) OR (van anh)) vi va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. hieu viec cac tac ((van hanh) OR (van anh)) vi va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu viec cac tac ((van hanh) OR (van anh)) vi va triet*.