Perhaps you should try some spelling variations:
"support die integration theories." » "support die integration theorems.", "support die integrationstheorie 2.", "support die integration theory.", "support trade integration theories.", "support de integration theories.", "support deep integration theories.", "support does integration theories."
"import south integration some." » "import youth integration some.", "import about integration some.", "import dutch integration some.", "import south integration south.", "import south integration soziale.", "import south integration social.", "report south integration some.", "importers south integration some.", "import growth integration some."

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: (("import south integration some.") OR ("support die integration theories."))~.
• Removing quotes may allow a broader search: (( import south integration some. ) or ( support die integration theories. ))~.
• Adding a wildcard symbol may retrieve word variants: (("import south integration some.") or ("support die integration theories."))*.