Perhaps you should try some spelling variations:
integration theory » integration through, information theory, innovation theory
crowd integration » grid integration, rfid integration, beyond integration
existing services » exporting services, testing services, nursing services
load existing » co existing, load testing, do existing
supply crowd » supply growth, supply cost, supply from
export load » export loans, export led, export good

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 ( export load existing services. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply crowd integration theory. ) or ( export load existing services. ))*.