Perhaps you should try some spelling variations:
"methode van bavel / gtt" » "methode von bavel / gtt", "methode v bavel / gtt", "methode vom 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 vii bases / gtt"
"methode vi bavel / gtt" » "methoden vi bavel / gtt", "methode von bavel / gtt", "methode 2 bavel / gtt", "methode vi based / gtt", "methode vi baked / gtt", "methode vi bases / gtt"

You may be able to get more results by adjusting your search query.

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