Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
va hanh » van hanh, va thanh, va danh
cua tuc » cua duc, cua tu, cua thuoc
y nang » ky nang, ly nang, v nang
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 y nang x hoi. hieu ve ((pham duc) or (cao duc)) va hanh hai ((cua te) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ve ((pham duc) OR (cao duc)) va hanh hai ((cua te) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ve ((pham duc) or (cao duc)) va hanh hai ((cua te) or (cua tuc))*.