Perhaps you should try some spelling variations:
mittelbare » unmittelbaren, unmittelbare, ermittelbare
unmittelbaree » ununmittelbarene, ununmittelbaree, unermittelbaree, unmittelbaren, unmittelbarer, unmittelbarem, unmittelbare, ermittelbare
unmittelbare » ununmittelbaren, ununmittelbare, unermittelbare, unmittelbar, ermittelbar
mittelbar » unmittelbar, ermittelbar
mittelbisau » mittelbau, mittelbis

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