Perhaps you should try some spelling variations:
mittelbar » mittelbare, unmittelbar, unmittelbare
ermittelbar » ermittelbare, erunmittelbar, erunmittelbare, unmittelbar
ermittelbaree » ermittelbareee, erunmittelbaree, erunmittelbareee, unmittelbaree, ermittelbare, ermittelbaren, vermittelbare

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 ermittelbar) OR ermittelbaree)*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mittelbar OR ermittelbar) or ermittelbaree)*".