Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
integration theories » integration theorems, integrationstheorie 2, integration theory
chain international » chains international, main international, can international
crowd integration » grid integration, rfid integration, beyond integration
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 chain international efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply crowd integration theories. ) or ( supply chain international efforts. ))*.