Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
nang xa » lang xa, nang ma, mang xa
hieu ke » hieu kem, chieu ke, hieu ky
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, cua triet
ke cau » ket cau
ve cua » le cua, de cua, te 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: so sach van ((nang xa) OR (nang x)) hoi. hieu ke cau truc van hanh ve cua tre~.
• Adding a wildcard symbol may retrieve word variants: so sach van ((nang xa) or (nang x)) hoi. hieu ke cau truc van hanh ve cua tre*.