Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
x hoi » xa hoi, o hoi, x ho
ve am » va am

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 ve am thuc ((va danh) OR (va hanh)) vai ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ve am thuc ((va danh) OR (va hanh)) vai ((cua triet) OR (cua vat))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ve am thuc ((va danh) OR (va hanh)) vai ((cua triet) or (cua vat))*".