Perhaps you should try some spelling variations:
mittelbar » ermittelbar
unmittelbare » unermittelbare, ermittelbar
unmittelbar » unermittelbar
mittelbare » ermittelbare
unmittelbaren » unermittelbaren, ermittelbarn
unermittelbaren » unerermittelbaren, ermittelbaren, unvermittelbare, unmittelbarer

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 unmittelbar)) OR mittelbare)) OR (unmittelbaren OR unermittelbaren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mittelbach or ((mittelbar or (unmittelbare or unmittelbar)) or mittelbare)) or (unmittelbaren OR unermittelbaren))".
• Adding a wildcard symbol may retrieve word variants: ((mittelbach or ((mittelbar or (unmittelbare or unmittelbar)) or mittelbare)) or (unmittelbaren OR unermittelbaren))*.