Perhaps you should try some spelling variations:
"mail's depressive disorder" » "mail's impressive disorder", "mild depressive disorder", "manisch depressive disorder"
"being depressive disorders" » "bei depressive disorders", "being expressive disorders", "beyond depressive disorders"

Try widening your search to All Fields.

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: (("mail's depressive disorder") OR ("being depressive disorders")).
• Removing quotes may allow a broader search: (( mail's depressive disorder ) or ( being depressive disorders )).
• Adding a wildcard symbol may retrieve word variants: (("mail's depressive disorder") or ("being depressive disorders"))*.