Perhaps you should try some spelling variations:
mittelbare » unmittelbaren
unmittelbare » ununmittelbaren, unmittelbar
unmittelbaree » ununmittelbarene, unmittelbare, unmittelbaren, unmittelbarem, unmittelbares
unmittelbarer » ununmittelbarenr, unmittelbarr, unmittelbaren, unmittelbar
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 unmittelbare) OR (unmittelbaree OR unmittelbarer))) OR mittelbis).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mittelbare or ((ermittelbar OR unmittelbare) or (unmittelbaree or unmittelbarer))) or mittelbis)".
• Adding a wildcard symbol may retrieve word variants: ((mittelbare or ((ermittelbar OR unmittelbare) or (unmittelbaree or unmittelbarer))) or mittelbis)*.