Perhaps you should try some spelling variations:
"methods vii bavel / gtt" » "methods vi bavel / gtt", "methods via bavel / gtt", "methods v bavel / gtt", "methods vii bases / gtt"
"methode van bavel / gtt" » "methode von bavel / gtt", "methode vii bavel / gtt", "methode vom bavel / gtt", "methode 2an bavel / gtt", "methode 3an bavel / gtt", "methode 4an 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 vi based / gtt", "methode vi baked / gtt", "methode vi bases / gtt"
"methode v bavel / gtt" » "methode 2 bavel / gtt", "methode 3 bavel / gtt", "methode 4 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.

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 van bavel / gtt") OR ("methode vi bavel / gtt"))) OR ("methods vii bavel / gtt"))) OR ((("methode v bavel / gtt") OR ("methode v bavula / gtt")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"methode van bavel / gtt\") or (\"methode vi bavel / gtt\"))) or (\"methods vii bavel / gtt\"))) or (((\"methode v bavel / gtt\") OR (\"methode v bavula / gtt\"))))".
• Removing quotes may allow a broader search: (((((( methode van bavel / gtt ) or ( methode vi bavel / gtt ))) or ( methods vii bavel / gtt ))) or ((( methode v bavel / gtt ) OR ( methode v bavula / gtt )))).
• Adding a wildcard symbol may retrieve word variants: (((((("methode van bavel / gtt") or ("methode vi bavel / gtt"))) or ("methods vii bavel / gtt"))) or ((("methode v bavel / gtt") OR ("methode v bavula / gtt"))))*.