Perhaps you should try some spelling variations:
"methode vian bavel / gtt" » "methods avian bavel / gtt", "methode von bavel / gtt", "methode vi bavel / gtt", "methode viian bavel / gtt", "methode 2ian bavel / gtt", "methode 4ian bavel / gtt"
"methode van bavel / gtt" » "methode von bavel / gtt", "methode vi bavel / gtt", "methode vii bavel / gtt", "methode vian bavel / gtt", "methode 2an bavel / gtt", "methode 4an bavel / gtt"
"methode v bavel / gtt" » "methode vi bavel / gtt", "methode 2 bavel / gtt", "methode 4 bavel / gtt", "methode v bavula / gtt"
"methode 3 bavel / gtt" » "methode 2 bavel / gtt", "methode 3 basel / 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 van bavel / gtt") OR ("methode vian bavel / gtt"))) OR ((("methode v bavel / gtt") OR ("methode 3 bavel / gtt"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"methode van bavel / gtt\") OR (\"methode vian bavel / gtt\"))) or (((\"methode v bavel / gtt\") or (\"methode 3 bavel / gtt\"))))*".
• Removing quotes may allow a broader search: (((( methode van bavel / gtt ) OR ( methode vian bavel / gtt ))) or ((( methode v bavel / gtt ) or ( methode 3 bavel / gtt ))))*.