Perhaps you should try some spelling variations:
mittelbar » unmittelbar, ermittelbar
unmittelbare » ununmittelbare, unermittelbare, unmittelbar, ermittelbar, ununmittelbaren
ununmittelbare » unununmittelbare, ununermittelbare, ununmittelbar, unermittelbar, unvermittelbare, unmittelbar, unmittelbaren, unununmittelbaren
mittelbare » unmittelbare, ermittelbare, unmittelbaren
ununmittelbaren » unununmittelbaren, ununermittelbaren, ununmittelbarn, unermittelbarn, unvermittelbaren, unmittelbarn, unmittelbarenn, unununmittelbarenn, unmittelbaren, unmittelbarer, unmittelbarem

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