Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
hieu van » hieu va, thien van, lieu va
so sach » bo sach, co sach, hoc sach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
van cac » van hac, van cau, van bac
so sanh » do sanh
nang xa » nang x, lang xa, nang ma
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: ((so sach) OR (so sanh)) y nang xa hoi. hieu van cac thuc ((va danh) OR (va hanh)) du cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) y nang xa hoi. hieu van cac thuc ((va danh) OR (va hanh)) du cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) y nang xa hoi. hieu van cac thuc ((va danh) OR (va hanh)) du cua tre*.