Perhaps you should try some spelling variations:
mittelbar » mittelbare, unmittelbar, ermittelbar
unmittelbaree » unmittelbareee, ununmittelbaree, unermittelbaree, unmittelbare, unmittelbaren, unmittelbarer
unmittelbareee » unmittelbareeee, ununmittelbareee, unermittelbareee, unmittelbaree, unmittelbarene, unmittelbarere, unmittelbare, unmittelbaren, unmittelbarer

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 ((unmittelbaree OR unmittelbareee) OR unmittelbareee)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(mittelbar or ((unmittelbaree OR unmittelbareee) or unmittelbareee))".
• Adding a wildcard symbol may retrieve word variants: (mittelbar or ((unmittelbaree OR unmittelbareee) or unmittelbareee))*.