Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
sach nuoc » sach duoc, cac nuoc, bach tuoc
hieu van » hieu va, thien van, lieu va
dinh moi » dinh so, dinh tri, dinh thi
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
va dinh » van dinh, va kinh, va tinh
moi cua » hoi cua, doi cua, moi quan
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: su sach ky nang xa hoi. ((((hieu viec) or (hieu ve))) or (hieu van)) sach nuoc va dinh moi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((((hieu viec) OR (hieu ve))) OR (hieu van)) sach nuoc va dinh moi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((((hieu viec) or (hieu ve))) or (hieu van)) sach nuoc va dinh moi cua tre*.