Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
ban nuoi » ban nguoi, ban noi, dan nuoi
ban nuoc » ban duoc, ban thuoc, luan nuoc
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
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 ((ban nuoc) or (ban nuoi)) ((va danh) OR (va hanh)) tu cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu viec ((ban nuoc) OR (ban nuoi)) ((va danh) OR (va hanh)) tu cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. hieu viec ((ban nuoc) or (ban nuoi)) ((va danh) OR (va hanh)) tu cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu viec ((ban nuoc) or (ban nuoi)) ((va danh) OR (va hanh)) tu cua tre*.