Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
gap international » eaap international, up international, crop international
irrigation scheme » irrigation systems
chain irrigation » grain irrigation, change irrigation, basin irrigation
supply gap » supply a

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply gap international efforts. ) or ( supply chain irrigation scheme. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply gap international efforts. ) OR ( supply chain irrigation scheme. )).
• Adding a wildcard symbol may retrieve word variants: (( supply gap international efforts. ) or ( supply chain irrigation scheme. ))*.