Perhaps you should try some spelling variations:
passiv » massiv, passiver
passiveren » massiveren, passivereren, passieren, passiverer, passiver
passiven » massiven, passiveren, passion
passiveen » massiveen, passivereen, passiveand, passiverer, passively
passive » massive, passivere
passivieren » massivieren, passiverieren, passivierende, passivierung, passieren

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