Perhaps you should try some spelling variations:
mittelbau » mittelbar
mittelbach » mittelbar
mittelbare » unmittelbare, unmittelbaren
ununmittelbaren » unununmittelbaren, unununmittelbarenn, unmittelbaren, unmittelbare, unmittelbarem
unmittelbarer » ununmittelbarer, ununmittelbarenr, unmittelbare, unmittelbaren

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