Perhaps you should try some spelling variations:
mittelbar » mittelbare, unmittelbar, unmittelbare
ermittelbar » ermittelbare, erunmittelbar, erunmittelbare, unmittelbar
erunmittelbare » erunmittelbaree, erununmittelbare, erununmittelbaree, unmittelbare, ermittelbare, unmittelbar
unmittelbaree » unmittelbareee, ununmittelbaree, ununmittelbareee, unmittelbare, unmittelbaren, unmittelbarer
ununmittelbareee » ununmittelbareeee, unununmittelbareee, unununmittelbareeee, ununmittelbaree, ununmittelbarene, ununmittelbarere, unmittelbare, unmittelbaren, unmittelbarer
mittelbisau » mittelbau, mittelbis

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