Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, vuc van
dao xuc » dao duc, dao tuc, dao xu
hieu va » lieu va, hieu qua
so sach » so sanh, bo sach, co sach
va nang » van nang, da nang, kha nang
vu nang » vuc nang, vu dang, v nang
cuu tre » cua tre, cau tren, cau treo
va dao » ca dao
di cuu » di cau, di cua, dinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((vu nang) or (((va nang) or (cam nang)))) xa hoi. hieu va dao xuc van hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((vu nang) OR (((va nang) OR (cam nang)))) xa hoi. hieu va dao xuc van hanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: so sach ((vu nang) or (((va nang) or (cam nang)))) xa hoi. hieu va dao xuc van hanh di cuu tre*.