Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
san benh » sau benh, tai benh, gay benh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
cua tre » cua te, cuu tre, cua triet
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: tu sach ky nang x hoi. hieu van ((cam duc) OR (cao duc)) ((san benh) OR (so benh)) di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu van ((cam duc) OR (cao duc)) ((san benh) or (so benh)) di cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu van ((cam duc) OR (cao duc)) ((san benh) or (so benh)) di cua tre*.