Perhaps you should try some spelling variations:
mittelbare » unmittelbare, unmittelbaren
ununmittelbaree » unununmittelbaree, unununmittelbarene, unmittelbare, unmittelbaren, unmittelbarer
unmittelbareer » ununmittelbareer, ununmittelbarener, unmittelbarer, unmittelbare, unmittelbaren
ermittelbar » unmittelbar
mittelbis » mittelbaus, mittelbar, mittelbau

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: ((mittelbare OR (ermittelbar OR (ununmittelbaree OR unmittelbareer))) OR mittelbis).
• Adding a wildcard symbol may retrieve word variants: ((mittelbare or (ermittelbar or (ununmittelbaree or unmittelbareer))) or mittelbis)*.