Perhaps you should try some spelling variations:
mittelbar » unmittelbar, unmittelbare
ermittelbar » erunmittelbar, erunmittelbare, unmittelbar, unmittelbare
erunmittelbar » erununmittelbar, erununmittelbare, unmittelbar, unmittelbare, vermittelbar
unununmittelbareee » ununununmittelbareee, ununununmittelbareeee, ununununmittelbarenee
unmittelbareer » ununmittelbareer, ununmittelbareeer, unmittelbarer, unmittelbare, unmittelbaren, ununmittelbarener
mittelbare » unmittelbare, unmittelbaree, 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 erunmittelbar) OR (unununmittelbareee OR unmittelbareer))) OR mittelbare).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mittelbar or ((ermittelbar OR erunmittelbar) or (unununmittelbareee or unmittelbareer))) or mittelbare)".
• Adding a wildcard symbol may retrieve word variants: ((mittelbar or ((ermittelbar OR erunmittelbar) or (unununmittelbareee or unmittelbareer))) or mittelbare)*.