Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiverere » passiveerere, massiverere, passivererere, passiverer, passivierende, passivierbare
passiverwerb » passiveerwerb, massiverwerb, passivererwerb, passiverer
passiven » passiveen, massiven, passiveren, passive, passion
massively » massive

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