Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
van hanh » van thanh, ban hanh, van anh
vinh cua » sinh cua, tinh cua, dinh cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet

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

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