Perhaps you should try some spelling variations:
"supply chain international airports." » "supply chain international airport.", "supply chain international transport.", "supply chain international airshow.", "supply chains international airports.", "supply main international airports.", "supply can international airports."
"supply aid conservation efforts." » "supply land conservation efforts.", "supply bird conservation efforts.", "supply wild conservation efforts.", "supply asia conservation efforts.", "supply a conservation efforts.", "supply ann 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: (("supply aid conservation efforts.") or ("supply chain international airports."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply aid conservation efforts.") OR ("supply chain international airports.")).
• Removing quotes may allow a broader search: (( supply aid conservation efforts. ) or ( supply chain international airports. )).
• Adding a wildcard symbol may retrieve word variants: (("supply aid conservation efforts.") or ("supply chain international airports."))*.