Perhaps you should try some spelling variations:
mittelbar » mittelbare, unmittelbar, ermittelbar
unmittelbaree » unmittelbareee, ununmittelbaree, unermittelbaree, unmittelbare, unmittelbarer, unmittelbarem
unmittelbaren » unmittelbareen, ununmittelbaren, unermittelbaren, unmittelbare, unmittelbar
ununmittelbaree » ununmittelbareee, unununmittelbaree, ununermittelbaree, ununmittelbare, ununmittelbarer, ununmittelbarem, unmittelbare, unmittelbarer, unmittelbarem
mittelbach » mittelbare

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: ((mittelbar OR mittelbach) OR ((unmittelbaree OR unmittelbaren) OR ununmittelbaree)).
• Adding a wildcard symbol may retrieve word variants: ((mittelbar or mittelbach) or ((unmittelbaree or unmittelbaren) or ununmittelbaree))*.