Perhaps you should try some spelling variations:
mittelbare » unmittelbaren, unmittelbare, ermittelbare
unmittelbare » ununmittelbaren, unmittelbar, ermittelbar, ununmittelbare, unermittelbare
unmittelbareee » ununmittelbarenee, unmittelbaree, ermittelbaree, unmittelbareren, unmittelbaren, unmittelbarer, ununmittelbareee, unermittelbareee
mittelbar » unmittelbar, ermittelbar

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: ((mittelbare OR (unmittelbare OR (unmittelbareee OR unmittelbare))) OR mittelbar).
• Adding a wildcard symbol may retrieve word variants: ((mittelbare or (unmittelbare or (unmittelbareee or unmittelbare))) or mittelbar)*.