Perhaps you should try some spelling variations:
mittelbar » unmittelbar, ermittelbar, unmittelbare
mittelbare » unmittelbare, ermittelbare, unmittelbaree
ununmittelbarene » unununmittelbarene, ununermittelbarene, unununmittelbareene, unmittelbare, unmittelbarer, unmittelbarem, ununmittelbaree, ununmittelbare
unmittelbaren » ununmittelbaren, unermittelbaren, ununmittelbareen, unmittelbare, unmittelbar
unmittelbareren » ununmittelbareren, unermittelbareren, ununmittelbareeren, unmittelbarer, unmittelbarsten, unmittelbarkeiten

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 ((ununmittelbarene OR unmittelbaren) OR unmittelbareren)).
• Adding a wildcard symbol may retrieve word variants: ((mittelbar or mittelbare) or ((ununmittelbarene or unmittelbaren) or unmittelbareren))*.