Perhaps you should try some spelling variations:
"support social integration theories." » "support social integration theorems.", "support social integrationstheorie 2.", "support social integration theory.", "support global integration theories.", "support financial integration theories.", "support regional integration theories.", "supporting social integration theories.", "supply social 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 ("support social integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support 4 integration soziale.") OR ("support social integration theories.")).
• Removing quotes may allow a broader search: (( support 4 integration soziale. ) or ( support social integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("support 4 integration soziale.") or ("support social integration theories."))*.