Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec dai » vien dai, viec tai, viec dat
dai thuc » dan thuc, dai thu, dai thua
dang vat » dang van, dong vat, dang nhat
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
va dang » van dang, va nang, va lang
vat cua » mat cua, bat cua, dat cua
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: te ((sach ty) or (sach y)) nang xa hoi. nhieu viec dai thuc va dang vat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) nang xa hoi. nhieu viec dai thuc va dang vat cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach y)) nang xa hoi. nhieu viec dai thuc va dang vat cua tre*.