Perhaps you should try some spelling variations:
"methode vian bavel / gtt" » "methode van bavel / gtt", "methods avian bavel / gtt", "methode von bavel / gtt", "methode viian bavel / gtt", "methode 2ian bavel / gtt", "methode 3ian bavel / gtt"
"method vii bavel / gtt" » "methods vii bavel / gtt", "method viz bavel / gtt", "method via bavel / gtt", "method van bavel / gtt", "method vii bases / gtt"
"methode v bavel / gtt" » "methode vi bavel / gtt", "methode 2 bavel / gtt", "methode 3 bavel / gtt", "methode van bavel / gtt", "methode v bavula / gtt"

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 vian bavel / gtt") OR ("method vii bavel / gtt"))) OR ("methode v bavel / gtt"))*.
• Removing quotes may allow a broader search: (((( methode vian bavel / gtt ) or ( method vii bavel / gtt ))) or ( methode v bavel / gtt ))*.