Perhaps you should try some spelling variations:
"supply firms integrationstheorie 2." » "supply der integrationstheorie 2.", "supply eine integrationstheorie 2.", "supply firms integrationstheorie fur.", "supply firms integration theories.", "supply firms interpretationstheorie 2.", "supply farm integrationstheorie 2.", "supply reforms integrationstheorie 2.", "support firms integrationstheorie 2."
"supply gaps information services." » "supply als information services.", "supply gets information services.", "supply laws information services.", "supply gap information services.", "supply gas information services."

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 firms integrationstheorie 2.") OR ("supply gaps information services."))~.
• Removing quotes may allow a broader search: (( supply firms integrationstheorie 2. ) or ( supply gaps information services. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply firms integrationstheorie 2.") or ("supply gaps information services."))*.