Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
qua cao » qua cac, qua ca, qua cai
cao duc » dao duc, cao suc, giao duc
cuu tre » cua tre, cau tren, cau treo
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang x hoi. hieu qua cao duc va ((thanh ve) or (hanh vi)) ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu qua cao duc va ((thanh ve) OR (hanh vi)) ((cua te) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu qua cao duc va ((thanh ve) or (hanh vi)) ((cua te) or (cuu tre))*.