Perhaps you should try some spelling variations:
"uber methodik leitfaden" » "uber methodischer leitfaden", "leber methodik leitfaden", "der methodik leitfaden", "uber methoden leitfaden"
"struktur technik leitfaden" » "struktur technische leitfaden", "kultur technik leitfaden"
"trubner technik leitfaden" » "uber technik leitfaden", "trigger technik leitfaden"

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: (((("trubner technik leitfaden") OR ("struktur technik leitfaden"))) OR ("uber methodik leitfaden"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"trubner technik leitfaden\") OR (\"struktur technik leitfaden\"))) or (\"uber methodik leitfaden\"))*".
• Removing quotes may allow a broader search: (((( trubner technik leitfaden ) OR ( struktur technik leitfaden ))) or ( uber methodik leitfaden ))*.