Perhaps you should try some spelling variations:
integration efforts » international efforts, conservation efforts
chain integration » trade integration, data integration, grid integration
irrigation system » irrigation systems, irrigation water, irrigation scheme
case irrigation » scale irrigation, change irrigation, canal irrigation
supply case » supply cost, supply curve, supply costs

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

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