Perhaps you should try some spelling variations:
"estate sector" » "state section", "estate vector", "estate vectors", "estate section"
"state action" » "state reactions", "state actors"
"state sector" » "state vector", "state vectors", "state section"

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 action") OR ((("estate sector") OR ("state sector")))).
• Removing quotes may allow a broader search: (( state action ) or ((( estate sector ) or ( state sector )))).
• Adding a wildcard symbol may retrieve word variants: (("state action") or ((("estate sector") or ("state sector"))))*.