Perhaps you should try some spelling variations:
"supply grid international airport." » "supply grid international transport.", "supply grid international airshow.", "supply 3rd international airport.", "supply third international airport.", "supply build international airport.", "supply crowd international airport.", "supply great international airport.", "support grid international airport."
"supply saline irrigation systems." » "supply saving irrigation systems.", "supply scale irrigation systems.", "supply basin irrigation systems.", "supply side irrigation systems.", "supply lines irrigation systems.", "supply saline irrigation system."

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 saline irrigation systems.") or ("supply grid international airport."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply saline irrigation systems.") OR ("supply grid international airport.")).
• Removing quotes may allow a broader search: (( supply saline irrigation systems. ) or ( supply grid international airport. )).
• Adding a wildcard symbol may retrieve word variants: (("supply saline irrigation systems.") or ("supply grid international airport."))*.