Perhaps you should try some spelling variations:
passiv » massiv, passiver
passive » massive, passivere
passivene » massivene, passiverene, passiveand, passiverer, passively, passione
passiven » massiven, passiveren, passion
aktivierender » aktivierenden, aktivierende, aktivieren
massiven » massive, 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 passive) OR ((passivene OR passiven) OR aktivierender)) OR (massiven OR massiveren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or passive) or ((passivene OR passiven) or aktivierender)) or (massiven or massiveren))".
• Adding a wildcard symbol may retrieve word variants: (((passiv or passive) or ((passivene OR passiven) or aktivierender)) or (massiven or massiveren))*.