Perhaps you should try some spelling variations:
"supply grid integration theories." » "supply grid integration theorems.", "supply grid integrationstheorie 2.", "supply grid integration theory.", "supply great integration theories.", "support grid integration theories."
"supply crowd integrating services." » "supply crowd integration services.", "supply crowd integrated services.", "supply crowd regulating services.", "supply from integrating services.", "supply now integrating services.", "supply toward integrating services.", "supply growth integrating services.", "supply cost integrating services."

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

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