Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passiveeeren » passiveeeeren, massiveeeren, passiveneeeren, passieren
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passiver, passieren
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 (massivement OR (passivieren OR (passiveeeren OR passiverer))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or (massively or (massivement or (passivieren or (passiveeeren OR passiverer)))))".
• Adding a wildcard symbol may retrieve word variants: (passiv or (massively or (massivement or (passivieren or (passiveeeren OR passiverer)))))*.