Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, hieu hien
sieu viet » su viet, dien viet, bien viet
ban nuoi » ban nguoi, ban noi, dan nuoi
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
nuoi va » nguoi va, nuoc va, noi va
cua tre » cua te, cuu tre, cua triet
va anh » van anh, va danh, va hanh
anh tu » anh tuan
tu cua » hu cua, vu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. ((hieu viec) OR (sieu viet)) ban nuoi va anh tu cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. ((hieu viec) OR (sieu viet)) ban nuoi va anh tu cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. ((hieu viec) OR (sieu viet)) ban nuoi va anh tu cua tre*.