Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
su triet » su viet, su tien, ve triet
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
van anh » van thanh, tuan anh, van minh
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 ((van hanh) OR (van anh)) vai ((su triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ve am thuc ((van hanh) OR (van anh)) vai ((su triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ve am thuc ((van hanh) OR (van anh)) vai ((su triet) or (va triet))*".