Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
sach thu » sach thue, sach thieu, sach tham
viec cac » vien cac, viec cua, viec lam
va trinh » van trinh, va tinh, lap trinh
trinh vi » trinh va, trinh ve, trinh viet
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
cac tuc » cac toc, cac tu, cac tac
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu ((nang x) OR (nang ma)) hoi. nhieu viec cac tuc va trinh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((nang x) or (nang ma)) hoi. nhieu viec cac tuc va trinh vi cua tre*.