Perhaps you should try some spelling variations:
"supply rate international efforts." » "supply rate international airports.", "supply rate international energy.", "supply rate international airport.", "supply rates international efforts.", "supply trade international efforts.", "supply raise international efforts.", "supply water international efforts.", "supply case international efforts.", "supply data international efforts."
"supply grid integration theories." » "supply grid integration theory.", "supply grid integration through.", "supply grid integration efforts.", "supply trade integration theories.", "supply _ integration theories.", "supply data integration theories.", "supply crowd 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 rate international efforts."))~.
• Removing quotes may allow a broader search: (( supply grid integration theories. ) or ( supply rate international efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply grid integration theories.") or ("supply rate international efforts."))*.