Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
crowd integration » grid integration, rfid integration, beyond integration
making services » banking services, banking service, planning services
supply crowd » supply growth, supply cost, supply from
supply road » supply cold, supply role, supply rural
road making » road marking, road markings, road mapping

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 road making services. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply crowd integration theories. ) or ( supply road making services. ))*.