Perhaps you should try some spelling variations:
"zinzendorf, nicolaus ludwig <graft von, 1700-1760>" » "zinzendorf, nicolaus ludwig <kraft von, 1700-1760>", "zinzendorf, nicolaus ludwig <grafl von, 1700-1760>", "zinzendorf, nicolaus ludwig <grafen von, 1700-1760>"
gray von » gray con, array von, gray box

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: (((("Zinzendorf, Nicolaus Ludwig <graf Von, 1700-1760>") OR ("Zinzendorf, Nicolaus Ludwig <gray Von, 1700-1760>"))) OR ("zinzendorf, nicolaus ludwig <graft von, 1700-1760>")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Zinzendorf, Nicolaus Ludwig <graf Von, 1700-1760>\") OR (\"Zinzendorf, Nicolaus Ludwig <gray Von, 1700-1760>\"))) or (\"zinzendorf, nicolaus ludwig <graft von, 1700-1760>\"))".
• Removing quotes may allow a broader search: (((( Zinzendorf, Nicolaus Ludwig <graf Von, 1700-1760> ) OR ( Zinzendorf, Nicolaus Ludwig <gray Von, 1700-1760> ))) or ( zinzendorf, nicolaus ludwig <graft von, 1700-1760> )).
• Adding a wildcard symbol may retrieve word variants: (((("Zinzendorf, Nicolaus Ludwig <graf Von, 1700-1760>") OR ("Zinzendorf, Nicolaus Ludwig <gray Von, 1700-1760>"))) or ("zinzendorf, nicolaus ludwig <graft von, 1700-1760>"))*.