Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
crowd integration » grid integration, trade integration, chain integration
green banking » free banking, open banking, green banks
supply crowd » supply growth, supply cost, supply how
supply green » supply urban
services. » series.

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 theories. ) or ( supply green banking services. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply crowd integration theories. ) OR ( supply green banking services. )).
• Adding a wildcard symbol may retrieve word variants: (( supply crowd integration theories. ) or ( supply green banking services. ))*.