Perhaps you should try some spelling variations:
passiv » massiv
passiver » massiver, passively, passiert
passivelyer » massivelyer, passively, passiverer, passiverwerb
passiven » massiven
passive » massive
massiver » massive, massiven, 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 ((passiver OR massiver) OR passivelyer)) OR ((passiven OR passive) OR passion)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or ((passiver or massiver) or passivelyer)) or ((passiven OR passive) or passion))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or ((passiver or massiver) or passivelyer)) or ((passiven OR passive) or passion))*.