Perhaps you should try some spelling variations:
integration efforts » international efforts, conservation efforts
irrigation system » irrigation systems, irrigation water, irrigation scheme
side integration » die integration, de integration, life integration
case irrigation » scale irrigation, use irrigation, change irrigation
supply case » supply cost, supply chain, supply curve

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 side integration efforts. ) OR ( supply case irrigation system. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply side integration efforts. ) or ( supply case irrigation system. ))*.