Perhaps you should try some spelling variations:
nhien viet » nhin viet, nghiep viet, trien viet
nhieu viec » hieu viec
trinh do » trinh ky
va trinh » van trinh, va tinh, lap trinh
cam tuc » cam tu, nam thuc, dam thuc
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
do cua » doi cua, co cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. ((nhieu viec) or (nhien viet)) ((cam tuc) OR (cam xuc)) va trinh do cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. ((nhieu viec) OR (nhien viet)) ((cam tuc) OR (cam xuc)) va trinh do cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. ((nhieu viec) or (nhien viet)) ((cam tuc) OR (cam xuc)) va trinh do cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. ((nhieu viec) or (nhien viet)) ((cam tuc) OR (cam xuc)) va trinh do cua tre*.