Perhaps you should try some spelling variations:
"support grid importing countries." » "support grid exporting countries.", "support grid importing country.", "support oil importing countries.", "support food importing countries.", "support gas importing countries.", "support agri importing countries.", "support grant importing countries.", "support group importing countries."
"supply grid conservation efforts." » "supply aid conservation efforts.", "supply good conservation efforts.", "supply grass conservation efforts.", "supply crowd conservation efforts.", "supply great conservation 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 conservation efforts.") or ("support grid importing countries."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply grid conservation efforts.") OR ("support grid importing countries.")).
• Removing quotes may allow a broader search: (( supply grid conservation efforts. ) or ( support grid importing countries. )).
• Adding a wildcard symbol may retrieve word variants: (("supply grid conservation efforts.") or ("support grid importing countries."))*.