Perhaps you should try some spelling variations:
"methode viii bavel / gtt" » "methode iii bavel / gtt", "methods viii bavel / gtt", "methoden vii bavel / gtt", "methoden viii bavel / gtt", "method viii bavel / gtt", "methode viii travel / gtt", "methode viii borel / gtt", "methode vonii bavel / gtt", "methode 2ii bavel / gtt", "methode 2iii bavel / gtt", "methode 3iii bavel / gtt", "methode 4iii bavel / gtt"
"methode vii bavel / gtt" » "methoden vii bavel / gtt", "methods vii bavel / gtt", "method vii bavel / gtt", "methode voni bavel / gtt", "methode 2i bavel / gtt", "methode van bavel / gtt", "methode vii bases / gtt", "methode 2ii bavel / gtt", "methode 3ii bavel / gtt", "methode 4ii bavel / gtt"
"methode vi bavel / gtt" » "methoden vi bavel / gtt", "methode von bavel / gtt", "methode 2 bavel / gtt", "methode 2i bavel / gtt", "methode 3i bavel / gtt", "methode 4i bavel / gtt", "methode van bavel / gtt", "methode vi based / gtt", "methode vi baked / gtt"
"methode v bavel / gtt" » "methode 2 bavel / gtt", "methode 3 bavel / gtt", "methode 4 bavel / gtt", "methode van bavel / gtt"
"methode v bavula / gtt" » "methode 2 bavula / gtt", "methode 3 bavula / gtt", "methode 4 bavula / gtt", "methode v.v bavula / gtt"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("methode viii bavel / gtt") OR ("methode vii bavel / gtt"))) OR ((((("methode v bavel / gtt") OR ("methode v bavula / gtt"))) OR ("methode vi bavel / gtt")))).
• Removing quotes may allow a broader search: (((( methode viii bavel / gtt ) or ( methode vii bavel / gtt ))) or ((((( methode v bavel / gtt ) or ( methode v bavula / gtt ))) or ( methode vi bavel / gtt )))).
• Adding a wildcard symbol may retrieve word variants: (((("methode viii bavel / gtt") or ("methode vii bavel / gtt"))) or ((((("methode v bavel / gtt") or ("methode v bavula / gtt"))) or ("methode vi bavel / gtt"))))*.