Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach
cua tre » cua te, cuu tre, cua triet
vu sach » vu bach, vu khach
co hoi » co hoc, co loi
ve nam » he nam, va nam, le nam
v nang » va nang, vu nang, van nang
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: ((su sach) OR (vu sach)) v nang ((x hoi) OR (co hoi)). hieu ve nam thuc va hanh di 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 va hanh di cua tre*.