Perhaps you should try some spelling variations:
passiv » massiv, passiven
passiver » massiver, passivener, passiven, passiert
passive » massive, passivene
passivene » massivene, passivenene, passiven, passiveand, passiverer
passively » massively, passivenely, passivity, passiven
massiven » passiven, massively, massiv
massiveren » massivere, massigeren, massivement

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