Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passieren
passivereren » passiveereren, massivereren, passiverereren, passivierenden, passieren, passiverwerb, passiverwerben, passiveren, passierenen
passiverer » passiveerer, massiverer, passivererer, passiverwerb, passiver, passieren
passiven » passiveen, massiven, passiveren, passive, passion

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 (passivieren OR (passivereren OR passiverer))) OR passiven).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or (passivieren or (passivereren OR passiverer))) or passiven)".
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passivieren or (passivereren OR passiverer))) or passiven)*.