Perhaps you should try some spelling variations:
"supply social integration theories." » "supply social integration theorems.", "supply social integrationstheorie 2.", "supply social integration theory.", "supply global integration theories.", "supply financial integration theories.", "supply regional integration theories."
"support 4 integration soziale." » "support 4 integration social.", "support 3 integration soziale.", "support 2 integration soziale.", "support 4.1 integration soziale.", "support _ integration soziale.", "support a integration soziale.", "support 3.4 integration soziale."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("support 4 integration soziale.") or ("supply social integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support 4 integration soziale.") OR ("supply social integration theories.")).
• Removing quotes may allow a broader search: (( support 4 integration soziale. ) or ( supply social integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("support 4 integration soziale.") or ("supply social integration theories."))*.