Perhaps you should try some spelling variations:
"gasen allgemeines" » "schalen allgemeines", "nerven allgemeines", "kernen allgemeines"
"basen allgemeine" » "fragen allgemeine", "deren allgemeine", "leben allgemeine"
"erste allgemeine" » "eine allgemeine", "akute allgemeine", "systeme allgemeine"

Try widening your search to All Fields.

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: (((("basen allgemeine") OR ("gasen allgemeines"))) OR ("erste allgemeine")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"basen allgemeine\") OR (\"gasen allgemeines\"))) or (\"erste allgemeine\"))".
• Removing quotes may allow a broader search: (((( basen allgemeine ) OR ( gasen allgemeines ))) or ( erste allgemeine )).
• Adding a wildcard symbol may retrieve word variants: (((("basen allgemeine") OR ("gasen allgemeines"))) or ("erste allgemeine"))*.