Perhaps you should try some spelling variations:
passiv » passiver
passively » passiverely, massively, passivity
passiven » passiveren, passion
passive » passivere
massiv » massive
massivene » massiveene, massiven, massive, massively
massivere » massiveere, massiver, massive, massively

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