Perhaps you should try some spelling variations:
"supply curve international efforts." » "supply curve international airports.", "supply curve international energy.", "supply curve international airport.", "supply survey international efforts.", "supply care international efforts.", "supply turkey international efforts."
"support grid conservation efforts." » "support aid conservation efforts.", "support good conservation efforts.", "support soil conservation efforts.", "support agri conservation efforts.", "support grant conservation efforts.", "support group conservation efforts."

Try widening your search to All Fields.

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