Perhaps you should try some spelling variations:
integration theory » integration through, information theory, innovation theory
irrigation schemes » irrigation scheme, irrigation systems
crowd integration » grid integration, rfid integration, beyond integration
furrow irrigation » farm irrigation, crop irrigation, flood irrigation
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 theory. ) OR ( supply furrow irrigation schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply crowd integration theory. ) or ( supply furrow irrigation schemes. ))*.