Perhaps you should try some spelling variations:
"supply chain international efforts." » "supply chain international airports.", "supply chain international energy.", "supply chain international airport.", "supply chains international efforts.", "supply main international efforts.", "supply can international efforts."
"supply grid integration theories." » "supply grid integration theorems.", "supply grid integrationstheorie 2.", "supply grid integration theory.", "supply crowd integration theories.", "supply great integration theories.", "support grid integration theories."

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