Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
integration schemes » irrigation schemes, integration some
crowd integration » grid integration, trade integration, chain integration
urban integration » european integration, global integration, trade integration
supply crowd » supply growth, supply cost, supply how
supply urban » supply rural

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply crowd integration schemes. ) or ( supply urban integration theories. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply crowd integration schemes. ) OR ( supply urban integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (( supply crowd integration schemes. ) or ( supply urban integration theories. ))*.