Perhaps you should try some spelling variations:
technik leitfaden » methodik leitfaden
methode leitfaden » methodik leitfaden, methode leitenden, methodischer leitfaden
trubner technik » uber technik, trigger technik, struktur technik
einer methode » eine methode, der methode

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: (( trubner technik leitfaden ) OR ( einer methode leitfaden )).
• Adding a wildcard symbol may retrieve word variants: (( trubner technik leitfaden ) or ( einer methode leitfaden ))*.