Perhaps you should try some spelling variations:
integration social » international social
canal irrigation » scale irrigation
fare integration » market integration, trade integration, data integration
supply canal » supply annual, supply rural, supply case
supply fare » supply farm, supply case, supply market
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 canal irrigation systems. ) OR ( supply fare integration social. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply canal irrigation systems. ) or ( supply fare integration social. ))*.