Perhaps you should try some spelling variations:
"manisch depressive disorders" » "manisch depressive disorder", "manic depressive disorders"
"build impressive disorder" » "build depressive disorder", "build aggressive disorders", "build depression disorder", "build immersive disorder", "build massive disorder"

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: (("manisch depressive disorders") OR ("build impressive disorder")).
• Removing quotes may allow a broader search: (( manisch depressive disorders ) or ( build impressive disorder )).
• Adding a wildcard symbol may retrieve word variants: (("manisch depressive disorders") or ("build impressive disorder"))*.