Perhaps you should try some spelling variations:
ban hanh » ban hang
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
tuc ban » thuc ban, truc ban, tu ban
cao tuc » dao tuc, cao duc, cao suc
so sach » co sach, hoc sach
bo sach » co sach, hoc sach
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va cao » va cac, va co, va dao
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: ((((so sach) OR (so sanh))) OR (bo sach)) y nang x hoi. hieu va cao tuc ban hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((so sach) OR (so sanh))) or (bo sach)) y nang x hoi. hieu va cao tuc ban hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((((so sach) OR (so sanh))) or (bo sach)) y nang x hoi. hieu va cao tuc ban hanh di cua tre*.