Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
danh dum » danh du, anh duc, danh tu
su sach » so sach, vu sach
so sanh » do sanh
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
dum cua » duy cua, dam cua, dung cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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 (so sanh)) y nang x hoi. hieu va cac thuc va danh dum cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) y nang x hoi. hieu va cac thuc va danh dum cua tre*.