Perhaps you should try some spelling variations:
chua tri » chu tri, chua trieu, chua tivi
chua tre » cua tre, chua trieu, cho tre
hanh vua » hanh va, hanh sua, hanh cua
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cac duc » cac du, cac dac, cac nuoc
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
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 va ((cac duc) or (cao duc)) van hanh vua ((chua tre) OR (chua tri))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu va ((cac duc) OR (cao duc)) van hanh vua ((chua tre) OR (chua tri))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu va ((cac duc) or (cao duc)) van hanh vua ((chua tre) OR (chua tri))*".