Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiveren » passiveeren, massiveren, passivereren, passieren, passiverer, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiveen » passiveeen, massiveen, passivereen, passiveand, passiverer, passive
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passieren
massiveen » massiven, massivement, massivsten

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