Perhaps you should try some spelling variations:
bo sach » co sach, hoc sach
sach ty » sach y, sach tu, sach thu
ty mang » ty xang, ty hang, tin mang
mang xa » lang xa, mang may, dang xay
cua tre » cuu tre, cua triet, dua tren
va nay » va ngay, va cay
luc va » tuc va, loc va
dan vi » doan vi, don vi, dan va
cua te » cua tu

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: bo sach ty mang xa hoi. lieu va nay ((luc va) OR (duc va)) dan vi ((cua tre) OR (cua te))~.
• Adding a wildcard symbol may retrieve word variants: bo sach ty mang xa hoi. lieu va nay ((luc va) or (duc va)) dan vi ((cua tre) or (cua te))*.