Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
some international » time international, from international, how international
irrigation scheme » irrigation systems
case irrigation » scale irrigation, change irrigation, canal irrigation
supply case » supply cost, supply chain, supply curve
supply some » supply side, supply cote, supply role

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply case irrigation scheme. ) OR ( supply some international efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply case irrigation scheme. ) or ( supply some international efforts. ))*.