Perhaps you should try some spelling variations:
mittelbar » mittelbare, unmittelbar, unmittelbare
ermittelbar » ermittelbare, erunmittelbar, erunmittelbare, unmittelbar
ermittelbare » ermittelbaree, erunmittelbare, erunmittelbaree, unmittelbare, mittelbare, vermittelbar
unmittelbareee » unmittelbareeee, ununmittelbareee, ununmittelbareeee, 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 ermittelbare) OR unmittelbareee)) OR mittelbisau).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mittelbar or ((ermittelbar OR ermittelbare) or unmittelbareee)) or mittelbisau)".
• Adding a wildcard symbol may retrieve word variants: ((mittelbar or ((ermittelbar OR ermittelbare) or unmittelbareee)) or mittelbisau)*.