Perhaps you should try some spelling variations:
"support system integrationstheorie 2." » "support der integrationstheorie 2.", "support eine integrationstheorie 2.", "support system integrationstheorie fur.", "support system integration theories.", "support system interpretationstheorie 2.", "support systems integrationstheorie 2.", "supply system integrationstheorie 2."
"export data integration south." » "export data integration study.", "export data integration some.", "export data integration social.", "export data integrity south.", "export day integration south.", "import data integration south."

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: (("support system integrationstheorie 2.") OR ("export data integration south."))~.
• Removing quotes may allow a broader search: (( support system integrationstheorie 2. ) or ( export data integration south. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support system integrationstheorie 2.") or ("export data integration south."))*.