Perhaps you should try some spelling variations:
mittelbar » mittelbare, unmittelbar, ermittelbar
unmittelbare » unmittelbaree, ununmittelbare, unermittelbare, unmittelbar, ermittelbar
unununmittelbareee » unununmittelbareeee, ununununmittelbareee, unununermittelbareee, unununmittelbaree, ununermittelbaree
ununununmittelbareee » ununununmittelbareeee, unununununmittelbareee, ununununermittelbareee, ununununmittelbaree, unununermittelbaree
unmittelbareeer » unmittelbareeeer, ununmittelbareeer, unermittelbareeer, unmittelbareer, ermittelbareer, unmittelbarer, unmittelbaren, unmittelbarkeit
mittelbau » mittelbare, mittelbach

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 (unmittelbare OR ((unununmittelbareee OR ununununmittelbareee) OR unmittelbareeer))) OR mittelbau)*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mittelbar or (unmittelbare or ((unununmittelbareee OR ununununmittelbareee) or unmittelbareeer))) or mittelbau)*".