Perhaps you should try some spelling variations:
so sach » bo sach, co sach, hoc sach
thi van » thi lan, thi hanh, thi nang
hanh di » hanh vi, hanh de, hang di
truc va » thuc va, thuc vat, trung va
van bac » van ban, van bao, van hac
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
tuc va » thuc va, tuc xa, duc va
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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) OR (so sanh)) v nang x hoi. thi van bac ((tuc va) OR (truc va)) hanh di cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) v nang x hoi. thi van bac ((tuc va) or (truc va)) hanh di cua tre*.