Perhaps you should try some spelling variations:
"states factors" » "estates factors", "stages factors", "status factors"
"state factors" » "state actors", "state factor", "state factory"
"state sector" » "estate sector", "state vectors", "state section"
"state actor" » "state actors", "state action", "state after"

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: (((("state actor") OR ((("state sector") OR ((("state vector") OR ("space vector"))))))) OR ((("state factors") OR ("states factors")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"state actor\") or (((\"state sector\") or (((\"state vector\") OR (\"space vector\"))))))) or (((\"state factors\") or (\"states factors\"))))".
• Removing quotes may allow a broader search: (((( state actor ) or ((( state sector ) or ((( state vector ) OR ( space vector ))))))) or ((( state factors ) or ( states factors )))).
• Adding a wildcard symbol may retrieve word variants: (((("state actor") or ((("state sector") or ((("state vector") OR ("space vector"))))))) or ((("state factors") or ("states factors"))))*.