Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
nhieu vien » nhiet dien, thieu nien, nhien viet
dai thuc » dan thuc, dai thu, dai thua
thuc cao » thuoc cao, thuc co, thuc can
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
cao dan » cao dang, cao danh, cac dan
cua tre » cua te, cuu tre, cua triet
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu nang xa hoi. ((nhieu vien) or (nhieu viec)) dai thuc cao dan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang xa hoi. ((nhieu vien) OR (nhieu viec)) dai thuc cao dan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. ((nhieu vien) or (nhieu viec)) dai thuc cao dan vi cua tre*.