Perhaps you should try some spelling variations:
"support crop international efforts." » "support crop international airports.", "support crop international energy.", "support crop international airport.", "support eaap international efforts.", "support action international efforts.", "support 2 international efforts.", "support crops international efforts.", "support cross international efforts.", "support across international efforts."
"support grid integration efforts." » "support grid conservation efforts.", "support agri integration efforts.", "support grant integration efforts.", "support group 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: (("support grid integration efforts.") or ("support crop international efforts."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support grid integration efforts.") OR ("support crop international efforts.")).
• Removing quotes may allow a broader search: (( support grid integration efforts. ) or ( support crop international efforts. )).
• Adding a wildcard symbol may retrieve word variants: (("support grid integration efforts.") or ("support crop international efforts."))*.