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
cua tre » cua te, cua triet, dua tren
cam tuc » cam xuc, cam tu, nam thuc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu tre » cau tren, cau treo
tuc va » thuc va, truc va, tuc xa

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 va trinh do ((cua tre) OR (cuu 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 va trinh do ((cua tre) OR (cuu 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 va trinh do ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. ((nhieu viec) or (nhien viet)) cam tuc va trinh do ((cua tre) OR (cuu tre))*.