Perhaps you should try some spelling variations:
"methods vii bavel / gtt" » "methods vi bavel / gtt", "methods via bavel / gtt", "methods v bavel / gtt", "methods vii bases / 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 3an bavel / gtt"
"methode 1i bavel / gtt" » "methode 1 bavel / gtt", "methode 10 bavel / gtt", "methode 11 bavel / gtt", "methode 1 pavel / gtt", "methode 13 navel / gtt"
"methode v bavel / gtt" » "methode vi bavel / gtt", "methode 2 bavel / gtt", "methode 3 bavel / gtt"
"methode v bavula / gtt" » "methode vi bavula / gtt", "methode 2 bavula / gtt", "methode 3 bavula / gtt", "methode v.v bavula / gtt"
"methode 4 bavula / gtt" » "methode 2 bavula / gtt", "methode 3 bavula / gtt", "methode 4 bala / 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 1i bavel / gtt"))) OR ("methods vii bavel / gtt"))) OR ((("methode v bavel / gtt") OR ((("methode v bavula / gtt") OR ("methode 4 bavula / gtt")))))).
• Removing quotes may allow a broader search: (((((( methode van bavel / gtt ) or ( methode 1i bavel / gtt ))) or ( methods vii bavel / gtt ))) or ((( methode v bavel / gtt ) or ((( methode v bavula / gtt ) or ( methode 4 bavula / gtt )))))).
• Adding a wildcard symbol may retrieve word variants: (((((("methode van bavel / gtt") or ("methode 1i bavel / gtt"))) or ("methods vii bavel / gtt"))) or ((("methode v bavel / gtt") or ((("methode v bavula / gtt") or ("methode 4 bavula / gtt"))))))*.