Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh dai » danh dau, danh di, danh sai
hieu va » hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
te sac » te sach, te cac, te san
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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: ((te sac) OR (ve cac)) ky nang x hoi. ((hieu va) OR (lieu va)) am thuc va danh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (ve cac)) ky nang x hoi. ((hieu va) OR (lieu va)) am thuc va danh dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (ve cac)) ky nang x hoi. ((hieu va) OR (lieu va)) am thuc va danh dai cua triet*.