Perhaps you should try some spelling variations:
"support der integration theories." » "support der integration theorems.", "support der integrationstheorie 2.", "support der integration theory.", "support zur integration theories.", "support sector integration theories.", "support de integration theories.", "support under integration theories.", "support deep integration theories."
"support grid integration soziale." » "support grid integration social.", "support agri integration soziale.", "support grant integration soziale.", "support group integration soziale."

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 der integration theories.") OR ("support grid integration soziale."))~.
• Removing quotes may allow a broader search: (( support der integration theories. ) or ( support grid integration soziale. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support der integration theories.") or ("support grid integration soziale."))*.