Perhaps you should try some spelling variations:
"export values integration theories." » "export values integration theorems.", "export values integrationstheorie 2.", "export values integration theory.", "export value integrating theories.", "export values immigration theories.", "export verses integration theories.", "export value integration theories.", "export volumes integration theories.", "import values integration theories."
"support group integration social." » "support group international social.", "support group interaction social.", "support group interactions social.", "support erp integration social.", "support grant integration social."

Try widening your search to All Fields.

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

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