Perhaps you should try some spelling variations:
"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"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"methode v bavel / gtt\") OR (\"methode 3 bavel / gtt\"))".
• Removing quotes may allow a broader search: (( methode v bavel / gtt ) OR ( methode 3 bavel / gtt )).
• Adding a wildcard symbol may retrieve word variants: (("methode v bavel / gtt") OR ("methode 3 bavel / gtt"))*.