Perhaps you should try some spelling variations:
mittelbar » ermittelbar
unmittelbare » unermittelbare, ermittelbar
ununmittelbare » ununermittelbare, unermittelbar, unvermittelbare, unmittelbarer, unmittelbarem
mittelbare » ermittelbare
unmittelbaren » unermittelbaren, ermittelbarn
unmittelbar » unermittelbar

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: ((mittelbach OR ((mittelbar OR ((unmittelbare OR ununmittelbare) OR ununmittelbare)) OR mittelbare)) OR (unmittelbaren OR unmittelbar)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mittelbach or ((mittelbar or ((unmittelbare or ununmittelbare) or ununmittelbare)) or mittelbare)) or (unmittelbaren OR unmittelbar))".
• Adding a wildcard symbol may retrieve word variants: ((mittelbach or ((mittelbar or ((unmittelbare or ununmittelbare) or ununmittelbare)) or mittelbare)) or (unmittelbaren OR unmittelbar))*.