Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang co » nang cao, nang doc, nang noi
hieu va » lieu va
vat dan » va dan, vat ran, hat dan
van dan » van ban, ban dan, van dao
vai cua » dai cua, hai cua, lai cua
co hoi » co hoc, co loi
thuc » thu

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 cac ky nang co hoi. ((hieu va) OR (hieu qua)) am thuc ((vat dan) OR (van dan)) vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang co hoi. ((hieu va) or (hieu qua)) am thuc ((vat dan) OR (van dan)) vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang co hoi. ((hieu va) or (hieu qua)) am thuc ((vat dan) OR (van dan)) vai cua triet*.