Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec cam » viec lam, viec cua, viec va
trinh ke » trinh ky, trinh he, trinh do
va trinh » van trinh, va tinh, lap trinh
cua tre » cua te, cua triet, dua tren
sach ky » sac ky, sach ty, sach kem
cam tuc » cam xuc, cam tu, nam thuc
cuu tre » cau tren, cau treo
lang xa » lang ha, dang xay, lang van
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) or (sach y)) lang xa hoi. nhieu viec cam tuc va trinh ke ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) lang xa hoi. nhieu viec cam tuc va trinh ke ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) lang xa hoi. nhieu viec cam tuc va trinh ke ((cua tre) OR (cuu tre))*".