Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, ban hanh
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, dia danh
tu sai » tu bai, tu san, tu lai
tu cai » tu cac, tu can, tu bai
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.

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