Perhaps you should try some spelling variations:
"supply crowd importing countries." » "supply crowd exporting countries.", "supply crowd importing country.", "supply food importing countries.", "supply growth importing countries.", "supply cost importing countries.", "supply how importing countries."
"supply grid integration efforts." » "supply grid international efforts.", "supply grid conservation efforts.", "supply trade integration efforts.", "supply _ integration efforts.", "supply data 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 grid integration efforts.") OR ("supply crowd importing countries."))~.
• Removing quotes may allow a broader search: (( supply grid integration efforts. ) or ( supply crowd importing countries. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply grid integration efforts.") or ("supply crowd importing countries."))*.