Perhaps you should try some spelling variations:
"methode 3an bavel / gtt" » "methode 3 bavel / gtt", "methode 3.1 bavel / gtt", "methode 3.4 bavel / gtt", "methode van bavel / gtt"
"methode vii bavel / gtt" » "methoden vii bavel / gtt", "methods vii bavel / gtt", "method vii bavel / gtt", "methode van bavel / gtt", "methode vii bases / gtt", "methode viii bavel / gtt", "methode 3ii bavel / gtt", "methode 4ii bavel / gtt"
"methode v bavel / gtt" » "methode vi bavel / gtt", "methode 3 bavel / gtt", "methode 4 bavel / gtt", "methode van bavel / gtt", "methode v bavula / gtt"
"methode 2 bavel / gtt" » "methode 2 babel / 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 3an bavel / gtt") OR ("methode vii bavel / gtt"))) OR ((("methode v bavel / gtt") OR ("methode 2 bavel / gtt")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"methode 3an bavel / gtt\") or (\"methode vii bavel / gtt\"))) or (((\"methode v bavel / gtt\") OR (\"methode 2 bavel / gtt\"))))".
• Removing quotes may allow a broader search: (((( methode 3an bavel / gtt ) or ( methode vii bavel / gtt ))) or ((( methode v bavel / gtt ) OR ( methode 2 bavel / gtt )))).
• Adding a wildcard symbol may retrieve word variants: (((("methode 3an bavel / gtt") or ("methode vii bavel / gtt"))) or ((("methode v bavel / gtt") OR ("methode 2 bavel / gtt"))))*.