Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
cua triet » su triet, va triet
viec dai » vien dai, viec tai, viec dat
dai thuc » dan thuc, dai thu, dai thua
thuc cao » thuoc cao, thuc co, thuc can
cua viet » ca viet, hoa viet, cua vat
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
cao dan » cao dang, cao danh, cac dan
dan vai » dan va, dan tai, dan vat

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 viec dai thuc cao dan vai ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. nhieu viec dai thuc cao dan vai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. nhieu viec dai thuc cao dan vai ((cua triet) OR (cua viet))*.