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

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. lieu va am thuc ((va danh) or (((va hanh) OR (ban hanh)))) mai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. lieu va am thuc ((va danh) OR (((va hanh) OR (ban hanh)))) mai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. lieu va am thuc ((va danh) or (((va hanh) OR (ban hanh)))) mai va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. lieu va am thuc ((va danh) or (((va hanh) OR (ban hanh)))) mai va triet*.