Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh dum » danh du, anh duc, danh tu
cac thuc » cach thuc, cac thu, can thuc
dum cua » duy cua, dam cua, dung cua
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
van cac » van hac, van cau, van bac
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
so sach » bo sach, co sach, hoc sach
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 sach))) OR (so sanh)) y nang xa hoi. hieu van cac thuc va danh dum cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((((su sach) or (so sach))) or (so sanh)) y nang xa hoi. hieu van cac thuc va danh dum cua tre*.