Perhaps you should try some spelling variations:
"hermann christian nach" » "herrmann christian nach" (Expand Search)
"johann christian zach" » "hans christian zach" (Expand Search), "von christian zach" (Expand Search), "doring christian zach" (Expand Search)
"johann christian nach" » "hans christian nach" (Expand Search), "von christian nach" (Expand Search), "doring christian nach" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("johann christian zach") OR ((("johann christian nach") OR ("hermann christian nach"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"johann christian zach\") OR (((\"johann christian nach\") OR (\"hermann christian nach\"))))*".
• Removing quotes may allow a broader search: (( johann christian zach ) OR ((( johann christian nach ) OR ( hermann christian nach ))))*.