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