Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passivieren » massivieren, passivenieren, passiverieren, passivierung, passieren, passagieren
passivierende » massivierende, passivenierende, passiverierende, passivierungde, passierende, passagierende, passivierender, aktivierende, passivierung
passive » massive, passivene, passivere

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