Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
crowd integration » grid integration, rfid integration, beyond integration
furrow irrigation » farm irrigation, crop irrigation, flood irrigation
irrigation scheme » irrigation systems
supply furrow » supply from
supply crowd » supply growth, supply cost, supply from

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 crowd integration theories. ) OR ( supply furrow irrigation scheme. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply crowd integration theories. ) or ( supply furrow irrigation scheme. ))*.