Perhaps you should try some spelling variations:
nhieu viec » nhien viet
hieu viec » sieu viet, hieu hien, hieu tiem
bach tuoc » sach duoc, sach nuoc
su sach » so sach, vu sach
doi cua » dai cua, hoi cua
dan doi » dan hoi, dan toi, van doi
tuoc va » thuoc va, nuoc va, duoc va
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va dan » ca dan, va dao, va dau

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 (nhieu viec))) or (hieu ve)) bach tuoc va dan doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((((hieu viec) OR (nhieu viec))) OR (hieu ve)) bach tuoc va dan doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((((hieu viec) OR (nhieu viec))) or (hieu ve)) bach tuoc va dan doi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((((hieu viec) OR (nhieu viec))) or (hieu ve)) bach tuoc va dan doi cua tre*.