Perhaps you should try some spelling variations:
mittelbar » unmittelbar, ermittelbar, unmittelbare
mittelbare » unmittelbare, ermittelbare, unmittelbaree, unmittelbaren
unmittelbarer » ununmittelbarer, unermittelbarer, ununmittelbareer, ununmittelbarenr, unmittelbare, unmittelbaren, unmittelbar
unmittelbareee » ununmittelbareee, unermittelbareee, ununmittelbareeee, ununmittelbarenee, unmittelbare, unmittelbaren, 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: ((mittelbar OR mittelbare) OR (unmittelbarer OR unmittelbareee)).
• Adding a wildcard symbol may retrieve word variants: ((mittelbar or mittelbare) or (unmittelbarer or unmittelbareee))*.