Perhaps you should try some spelling variations:
"zinzendorf, nikolaus ludwig <gray von, 1700-1760>" » "zinzendorf, nicolaus ludwig <gray von, 1700-1760>", "zinzendorf, nikolaus ludwig <gray con, 1700-1760>", "zinzendorf, nikolaus ludwig <array von, 1700-1760>", "zinzendorf, nikolaus ludwig <gray box, 1700-1760>"
"zinzendorf, nicolas ludwig <graf von, 1700-1760>" » "zinzendorf, nicolaus ludwig <graf von, 1700-1760>", "zinzendorf, nicolas lewis <graf von, 1700-1760>", "zinzendorf, nicolas ludwig <graft von, 1700-1760>", "zinzendorf, nicolas ludwig <graw von, 1700-1760>", "zinzendorf, nicolas ludwig <gram von, 1700-1760>"
"zinzendorf, nicolas ludwig <gray von, 1700-1760>" » "zinzendorf, nicolaus ludwig <gray von, 1700-1760>", "zinzendorf, nicolas lewis <gray von, 1700-1760>", "zinzendorf, nicolas ludwig <gray con, 1700-1760>", "zinzendorf, nicolas ludwig <array von, 1700-1760>", "zinzendorf, nicolas ludwig <gray box, 1700-1760>"

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, nicolas ludwig <graf von, 1700-1760>") OR ((("zinzendorf, nicolas ludwig <gray von, 1700-1760>") OR ("zinzendorf, nikolaus ludwig <gray 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 <gray von, 1700-1760>\") OR (\"zinzendorf, nikolaus ludwig <gray von, 1700-1760>\"))))".
• Removing quotes may allow a broader search: (( zinzendorf, nicolas ludwig <graf von, 1700-1760> ) or ((( zinzendorf, nicolas ludwig <gray von, 1700-1760> ) OR ( zinzendorf, nikolaus ludwig <gray von, 1700-1760> )))).
• Adding a wildcard symbol may retrieve word variants: (("zinzendorf, nicolas ludwig <graf von, 1700-1760>") or ((("zinzendorf, nicolas ludwig <gray von, 1700-1760>") OR ("zinzendorf, nikolaus ludwig <gray von, 1700-1760>"))))*.