Perhaps you should try some spelling variations:
allgemein » allgemeinen, allgemeines
allgemeiner » allgemeinener, allgemeineser, allgemeinen, allgemeines
allgemeinere » allgemeinenere, allgemeinesere, allgemeinene, allgemeinese, allgemeinen, allgemeines, allgemeinem
allgemeine » allgemeinene, allgemeinese

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: bildung ((allgemein OR allgemeiner) OR (allgemeinere OR allgemeine))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bildung ((allgemein OR allgemeiner) or (allgemeinere or allgemeine))*".