Perhaps you should try some spelling variations:
"supply crowd integrationstheorie 2." » "supply der integrationstheorie 2.", "supply eine integrationstheorie 2.", "supply crowd integrationstheorie fur.", "supply crowd integration theories.", "supply crowd interpretationstheorie 2.", "supply growth integrationstheorie 2.", "supply from integrationstheorie 2."
"supply cost irrigation systems." » "supply crop irrigation systems.", "supply cost mitigation systems.", "supply et irrigation systems.", "supply costs irrigation systems.", "supply cost irrigation system."

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 integrationstheorie 2.") or ("supply cost irrigation systems."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply crowd integrationstheorie 2.") OR ("supply cost irrigation systems."))*.
• Removing quotes may allow a broader search: (( supply crowd integrationstheorie 2. ) or ( supply cost irrigation systems. ))*.