Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
dao duc » giao duc, tao duoc
dao vuc » dao tuc, dao vu, dao vung
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
va nang » van nang, da nang, cam nang
v nang » vu nang, van nang, voi nang
vi cua » vai cua, di 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 ((v nang) OR (va nang)) xa hoi. hieu va ((dao vuc) OR (dao duc)) van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((v nang) or (va nang)) xa hoi. hieu va ((dao vuc) OR (dao duc)) van hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) or (va nang)) xa hoi. hieu va ((dao vuc) OR (dao duc)) van hanh vi cua tre*.