Perhaps you should try some spelling variations:
mittelbar » mittelbare, unmittelbar, unmittelbare
ermittelbar » ermittelbare, erunmittelbar, erunmittelbare, unmittelbar
erunmittelbar » erunmittelbare, erununmittelbar, erununmittelbare, unmittelbar, unmittelbare, vermittelbar
unmittelbaree » unmittelbareee, ununmittelbaree, ununmittelbareee, unmittelbare, unmittelbaren, unmittelbarer
unmittelbareer » unmittelbareeer, ununmittelbareer, ununmittelbareeer, unmittelbarer, unmittelbarenr, unmittelbarerr, unmittelbare, unmittelbaren
mittelbis » mittelbaus, 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: ((mittelbar OR ((ermittelbar OR erunmittelbar) OR (unmittelbaree OR unmittelbareer))) OR mittelbis).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mittelbar or ((ermittelbar OR erunmittelbar) or (unmittelbaree or unmittelbareer))) or mittelbis)".
• Adding a wildcard symbol may retrieve word variants: ((mittelbar or ((ermittelbar OR erunmittelbar) or (unmittelbaree or unmittelbareer))) or mittelbis)*.