Perhaps you should try some spelling variations:
nhieu vien » nhieu viec, nhiet dien, thieu nien
nhien viet » nhin viet, nghiep viet, trien viet
thuc can » thuc chan, thuc dan, thuc van
dai thuc » dan thuc, dai thu, dai thua
te sach » toc sach
can dan » canh dan, cac dan, can ban
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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 ty nang ma hoi. ((nhieu vien) or (nhien viet)) dai thuc can dan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. ((nhieu vien) OR (nhien viet)) dai thuc can dan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. ((nhieu vien) or (nhien viet)) dai thuc can dan vi cua tre*.