Perhaps you should try some spelling variations:
mittelbar » mittelbare, unmittelbar, unmittelbare
ermittelbar » ermittelbare, erunmittelbar, erunmittelbare, unmittelbar
unmittelbarer » unmittelbareer, ununmittelbarer, ununmittelbareer, unmittelbare, unmittelbaren, unmittelbar
unmittelbareee » unmittelbareeee, ununmittelbareee, ununmittelbareeee, unmittelbareren, unmittelbare, unmittelbaren

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