Perhaps you should try some spelling variations:
"support private international airport." » "support private information airport.", "support finance international airport.", "support private international transport.", "support private international airshow.", "supporting private international airport.", "support climate international airport.", "supply private international airport."
"support food conservation efforts." » "support good conservation efforts.", "support wood conservation efforts.", "support from conservation efforts.", "support follow conservation efforts.", "support funds 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 food conservation efforts.") or ("support private international airport."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support food conservation efforts.") OR ("support private international airport.")).
• Removing quotes may allow a broader search: (( support food conservation efforts. ) or ( support private international airport. )).
• Adding a wildcard symbol may retrieve word variants: (("support food conservation efforts.") or ("support private international airport."))*.