Perhaps you should try some spelling variations:
"methoden von bavel / gtt" » "methoden 1 bavel / gtt", "methoden 2 bavel / gtt", "methoden 2.1 bavel / gtt", "methoden van bavel / gtt", "methoden von babel / gtt", "methoden von gavel / gtt"
"methode von bavel / gtt" » "methode van bavel / gtt", "methode von babel / gtt", "methode von gavel / gtt"

Try widening your search to All Fields.

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