Perhaps you should try some spelling variations:
"supply policy intervention social." » "supply policy intervencion social.", "supply policy intervention local.", "supply policy intervention still.", "supply policy interventions social.", "supply policies intervention social.", "supplier policy intervention social.", "support policy intervention social."
"supply grid integration efforts." » "supply grid international efforts.", "supply grid conservation efforts.", "supply crowd integration efforts.", "supply great integration efforts.", "support grid integration efforts."

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: (("supply policy intervention social.") OR ("supply grid integration efforts."))~.
• Removing quotes may allow a broader search: (( supply policy intervention social. ) or ( supply grid integration efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply policy intervention social.") or ("supply grid integration efforts."))*.