Perhaps you should try some spelling variations:
"methode iv bayes / gtt" » "methoden iv bayes / gtt", "methode im bayes / gtt", "methode ii bayes / gtt", "methode die bayes / gtt", "methode _ bayes / gtt", "methode 4 bayes / gtt"
"methode 2 bayes / gtt" » "methode _ bayes / gtt", "methode 4 bayes / gtt"

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: (("methode 2 bayes / gtt") OR ("methode iv bayes / gtt"))*.
• Removing quotes may allow a broader search: (( methode 2 bayes / gtt ) or ( methode iv bayes / gtt ))*.