Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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 xa hoi. hieu ve ((pham duc) or (cao duc)) va hanh hai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ve ((pham duc) OR (cao duc)) va hanh hai ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ve ((pham duc) or (cao duc)) va hanh hai ((cua te) or (cua tu))*.