Perhaps you should try some spelling variations:
allgemein » allgemeine, allgemeinen, allgemeines
allgemeinere » allgemeineere, allgemeinenere, allgemeinesere, allgemeiner, allgemeine, allgemeinen
allgemeinwissen » allgemeinewissen, allgemeinenwissen, allgemeineswissen

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 (allgemeinere OR allgemeinwissen))*.