Perhaps you should try some spelling variations:
"johann gottlieb sicht" » "johann gottfried sicht" (Expand Search), "hahn gottlieb sicht" (Expand Search), "johann gottlieb icht" (Expand Search)
"johann gottlieb icht" » "johann gottfried icht" (Expand Search), "hahn gottlieb icht" (Expand Search), "johann gottlieb hahn" (Expand Search)
"johann gottlieb sich" » "johann gottfried sich" (Expand Search), "hahn gottlieb sich" (Expand Search), "johann gottlieb ich" (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 gottlieb sicht") OR ("johann gottlieb icht"))) OR ("johann gottlieb sich"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"johann gottlieb sicht\") OR (\"johann gottlieb icht\"))) OR (\"johann gottlieb sich\"))".
• Removing quotes may allow a broader search: (((( johann gottlieb sicht ) OR ( johann gottlieb icht ))) OR ( johann gottlieb sich )).
• Adding a wildcard symbol may retrieve word variants: (((("johann gottlieb sicht") OR ("johann gottlieb icht"))) OR ("johann gottlieb sich"))*.