Perhaps you should try some spelling variations:
transformer spanned » transformer based
dc transformer » _ transformer, 3 transformer, a transformer
spanned across » shared across, space across
transfer bei » transfer beim, transfers bei, transfer der
ende dc » ende der, ende des, ende den
luis a » luis f, luis c
a heat » a heart, _ heat, a head
bis » bias
marx » mark, mary, marc

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: (( bis ende dc transformer spanned across ) OR ( luis a heat transfer bei marx ))~.
• Adding a wildcard symbol may retrieve word variants: (( bis ende dc transformer spanned across ) or ( luis a heat transfer bei marx ))*.