Perhaps you should try some spelling variations:
passiver » passiven, passively, passiert
massiv » massive
massiven » massiveen, massive, passiven, massively
massiveen » massiveeen, massivement, massivsten, massive
massigeren » massiger, massigen, massivere

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: (((passive OR passiver) OR massiv) OR ((massiven OR massiveen) OR massigeren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passive or passiver) or massiv) or ((massiven OR massiveen) or massigeren))".
• Adding a wildcard symbol may retrieve word variants: (((passive or passiver) or massiv) or ((massiven OR massiveen) or massigeren))*.