Perhaps you should try some spelling variations:
"supply trade international efforts." » "supply trade international airports.", "supply trade international energy.", "supply trade international airport.", "supply care international efforts.", "supply private international efforts.", "supply states international efforts.", "supply side international efforts.", "supply case 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.

You may be able to get more results by adjusting your search query.

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