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

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