Perhaps you should try some spelling variations:
integration efforts » international efforts, conservation efforts
field irrigation » fed irrigation, led irrigation, flood irrigation
cost integration » post integration, test integration, about integration
supply field » supply cold, supply food
supply cost » supply costs
systems. » system.

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 field irrigation systems. ) OR ( supply cost integration efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply field irrigation systems. ) or ( supply cost integration efforts. ))*.