Perhaps you should try some spelling variations:
passiv » passiver
passiven » passiveren, passion
passive » passivere
passivene » passiverene, passione, passiveand, passiverer, passively
massiv » massive
massiven » massiveen, massive, massively
massiveren » massiveeren, massivere, massigeren, massivement
aktivierender » aktivierenden, aktivierende, aktivieren

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