Perhaps you should try some spelling variations:
nicolas ludwig » nikolaus ludwig, nicolas lewis
graft von » kraft von, grafl von, grafen von
<graf » <gray, <graw, <gram
<graft » <grayt, <grawt, <gramt
nicolaus » nikolaus, nicola, nicolai

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, nicolas ludwig <graf von, 1700-1760> ) OR ((( zinzendorf, nicolas ludwig <graft 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, nicolas ludwig <graf von, 1700-1760> ) or ((( zinzendorf, nicolas ludwig <graft von, 1700-1760> ) OR ( zinzendorf, nicolaus ludwig <graft von, 1700-1760> ))))".
• Adding a wildcard symbol may retrieve word variants: (( zinzendorf, nicolas ludwig <graf von, 1700-1760> ) or ((( zinzendorf, nicolas ludwig <graft von, 1700-1760> ) OR ( zinzendorf, nicolaus ludwig <graft von, 1700-1760> ))))*.