Perhaps you should try some spelling variations:
"methoden vi bayes / gtt" » "methoden v bayes / gtt", "methoden von bayes / gtt", "methoden 1 bayes / gtt", "methoden die bayes / gtt", "methoden ive bayes / gtt", "methoden mit bayes / gtt"
"methode vi bayes / gtt" » "methode von bayes / gtt", "methode 2 bayes / gtt", "methode 4 bayes / gtt", "methode die bayes / gtt", "methode ive bayes / gtt", "methode mit bayes / gtt"
"methode vi bases / gtt" » "methode von bases / gtt", "methode 2 bases / gtt", "methode 4 bases / gtt", "methode i bases / gtt", "methode ii bases / gtt", "methode vi based / gtt"
"methode 3 bayes / gtt" » "methode 2 bayes / gtt", "methode _ bayes / gtt", "methode 4 bayes / gtt"

Try widening your search to All Fields.

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 3 bayes / gtt") OR ((((("methode vi bayes / gtt") OR ("methoden vi bayes / gtt"))) OR ("methode vi bases / gtt")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"methode 3 bayes / gtt\") or (((((\"methode vi bayes / gtt\") OR (\"methoden vi bayes / gtt\"))) or (\"methode vi bases / gtt\"))))".
• Removing quotes may allow a broader search: (( methode 3 bayes / gtt ) or ((((( methode vi bayes / gtt ) OR ( methoden vi bayes / gtt ))) or ( methode vi bases / gtt )))).
• Adding a wildcard symbol may retrieve word variants: (("methode 3 bayes / gtt") or ((((("methode vi bayes / gtt") OR ("methoden vi bayes / gtt"))) or ("methode vi bases / gtt"))))*.