Perhaps you should try some spelling variations:
"methode van bavel / gtt" » "methode vii bavel / gtt", "methode vom bavel / gtt", "methode viii bavel / gtt", "methode 2an bavel / gtt", "methode 3an bavel / gtt", "methode 4an bavel / gtt"
"methode vi bavel / gtt" » "methoden vi bavel / gtt", "methode 2 bavel / gtt", "methode 3 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 von bavel / gtt" » "methode von babel / gtt", "methode von gavel / gtt", "methode von havel / gtt", "methode 2on bavel / gtt", "methode 3on bavel / gtt", "methode 4on bavel / gtt"
"methode v bavel / gtt" » "methode 2 bavel / gtt", "methode 3 bavel / gtt", "methode 4 bavel / gtt", "methode v bavula / 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 von bavel / gtt") OR ((("methode vi bavel / gtt") OR ("methode van bavel / gtt"))))) OR ("methode v bavel / gtt"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"methode von bavel / gtt\") or (((\"methode vi bavel / gtt\") OR (\"methode van bavel / gtt\"))))) or (\"methode v bavel / gtt\"))*".
• Removing quotes may allow a broader search: (((( methode von bavel / gtt ) or ((( methode vi bavel / gtt ) OR ( methode van bavel / gtt ))))) or ( methode v bavel / gtt ))*.