Perhaps you should try some spelling variations:
"support trade international airports." » "support trade international airport.", "support trade international transport.", "support trade international airshow.", "support care international airports.", "support private international airports.", "support states international airports.", "export trade international airports.", "support grant international airports.", "import trade international airports."
"support good conservation efforts." » "support soil conservation efforts.", "support land conservation efforts.", "support bird conservation efforts.", "support tool conservation efforts.", "support grid conservation efforts.", "support poor 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 good conservation efforts.") or ("support trade international airports."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support good conservation efforts.") OR ("support trade international airports.")).
• Removing quotes may allow a broader search: (( support good conservation efforts. ) or ( support trade international airports. )).
• Adding a wildcard symbol may retrieve word variants: (("support good conservation efforts.") or ("support trade international airports."))*.