Perhaps you should try some spelling variations:
"supply factors integration schengen." » "supply factors integration changed.", "supply factors integration schemes.", "supply factors integration challenges.", "supply factor integration schengen.", "supply facto integration schengen.", "supply sector integration schengen.", "supply functions integration schengen."
"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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply grid integration efforts.") or ("supply factors integration schengen."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply grid integration efforts.") OR ("supply factors integration schengen.")).
• Removing quotes may allow a broader search: (( supply grid integration efforts. ) or ( supply factors integration schengen. )).
• Adding a wildcard symbol may retrieve word variants: (("supply grid integration efforts.") or ("supply factors integration schengen."))*.