Perhaps you should try some spelling variations:
nhieu vien » nhieu viec, nhiet dien, thieu nien
vien dai » hien dai
dai thuc » dan thuc, dai thu, dai thua
cao dan » cao danh, cac dan, ca dan
cua tre » cuu tre, cua triet, dua tren
te sach » toc sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua te » cua tu

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 dai thuc ((cao dan) or (cao dang)) vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. nhieu vien dai thuc ((cao dan) OR (cao dang)) vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. nhieu vien dai thuc ((cao dan) or (cao dang)) vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. nhieu vien dai thuc ((cao dan) or (cao dang)) vi ((cua tre) OR (cua te))*.