Perhaps you should try some spelling variations:
spatial integration » social integration, vertical integration, national integration
integration efforts » international efforts, conservation efforts
scheme irrigation » scale irrigation, change irrigation, spate irrigation
irrigation system » irrigation systems, irrigation water, irrigation scheme
supply spatial » supply social

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