Perhaps you should try some spelling variations:
mittelbar » mittelbare, unmittelbar, ermittelbar
unmittelbaren » unmittelbareen, ununmittelbaren, unermittelbaren, unmittelbare, unmittelbar
unermittelbaren » unermittelbareen, unerunmittelbaren, unerermittelbaren, ermittelbaren, unvermittelbare, unmittelbare

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