Perhaps you should try some spelling variations:
vat hang » van hang, dat hang, va hang
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach
hang vi » hang va, hanh vi, hang di
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
vu sach » vu bach, vu khach
v nang » va nang, vu nang, van nang
ve nam » he nam, va nam, le nam
vi cua » vai cua, di cua
co hoi » co hoc, co loi
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: ((su sach) OR (vu sach)) v nang ((x hoi) OR (co hoi)). hieu ve nam thuc vat hang vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) v nang ((x hoi) or (co hoi)). hieu ve nam thuc vat hang vi cua tre*.