Perhaps you should try some spelling variations:
mittelbar » ermittelbar, unmittelbare
unmittelbar » unermittelbar, ununmittelbare
mittelbare » ermittelbare, unmittelbaree, unmittelbare
unmittelbaren » unermittelbaren, ununmittelbareen, ununmittelbaren, unmittelbare
unmittelbaree » unermittelbaree, ununmittelbareee, ununmittelbaree, unmittelbare, 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: (((mittelbar OR unmittelbar) OR mittelbach) OR ((mittelbare OR unmittelbaren) OR unmittelbaree))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((mittelbar OR unmittelbar) or mittelbach) or ((mittelbare or unmittelbaren) or unmittelbaree))*".