Perhaps you should try some spelling variations:
"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"
"methods vii bavel / gtt" » "methods vi bavel / gtt", "methods via bavel / gtt", "methods v bavel / gtt", "methods vii bases / gtt"
"methode vi bases / gtt" » "methoden vi bases / gtt", "methode von bases / gtt", "methode 2 bases / gtt", "methode 2i bases / gtt", "methode 3i bases / gtt", "methode 4i bases / gtt", "methode i bases / gtt", "methode ii bases / gtt", "methode vi based / gtt"
"methode 2i bases / gtt" » "methode 2 bases / gtt", "methode 23 bases / gtt", "methode 29 bases / gtt", "methode i bases / gtt", "methode ii bases / gtt"
"methode v bavel / gtt" » "methode 2 bavel / gtt", "methode 3 bavel / gtt", "methode 4 bavel / gtt", "methode 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 bases / gtt") OR ("methode 2i bases / gtt"))))) OR ("methods vii bavel / gtt"))) OR ("methode v bavel / gtt")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"methode van bavel / gtt\") or (((\"methode vi bases / gtt\") OR (\"methode 2i bases / gtt\"))))) or (\"methods vii bavel / gtt\"))) or (\"methode v bavel / gtt\"))".
• Removing quotes may allow a broader search: (((((( methode van bavel / gtt ) or ((( methode vi bases / gtt ) OR ( methode 2i bases / gtt ))))) or ( methods vii bavel / gtt ))) or ( methode v bavel / gtt )).
• Adding a wildcard symbol may retrieve word variants: (((((("methode van bavel / gtt") or ((("methode vi bases / gtt") OR ("methode 2i bases / gtt"))))) or ("methods vii bavel / gtt"))) or ("methode v bavel / gtt"))*.