Perhaps you should try some spelling variations:
"methode 2an bavel / gtt" » "methode 2 bavel / gtt", "methode 2.1 bavel / gtt", "methode 2.2 bavel / gtt", "methode van bavel / gtt"
"methode v bavel / gtt" » "methode vi bavel / gtt", "methode 2 bavel / gtt", "methode 4 bavel / gtt", "methode van bavel / gtt", "methode v bavula / gtt"
"methode 3 bavel / gtt" » "methode 2 bavel / gtt", "methode 3 basel / 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 2an bavel / gtt") OR ((("methode v bavel / gtt") OR ("methode 3 bavel / gtt")))).
• Removing quotes may allow a broader search: (( methode 2an bavel / gtt ) or ((( methode v bavel / gtt ) or ( methode 3 bavel / gtt )))).
• Adding a wildcard symbol may retrieve word variants: (("methode 2an bavel / gtt") or ((("methode v bavel / gtt") or ("methode 3 bavel / gtt"))))*.