Perhaps you should try some spelling variations:
experimentiert » experimentieren, experimentierens, experimenting
experimentierte » experimentierene, experimentierense, experimentinge, experimentieren, experimentier, experimentierfeld
experimentierenden » experimentierfelder, experimentieren, experimentierens

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: ( experimentiert OR (experimentierte OR experimentierenden) ).
• Adding a wildcard symbol may retrieve word variants: ( experimentiert or (experimentierte or experimentierenden) )*.