Perhaps you should try some spelling variations:
"deren allgemeine" » "denken allgemeine", "energien allgemeine", "tumoren allgemeine"
"feld allgemeine" » "felder allgemeine", "umfeld allgemeines", "falle allgemeine"
"ugld allgemeine" » "und allgemeine", "gold allgemeines", "und allgemeines"

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: (((("feld allgemeine") OR ("ugld allgemeine"))) OR ("deren allgemeine")).
• Removing quotes may allow a broader search: (((( feld allgemeine ) or ( ugld allgemeine ))) or ( deren allgemeine )).
• Adding a wildcard symbol may retrieve word variants: (((("feld allgemeine") or ("ugld allgemeine"))) or ("deren allgemeine"))*.