Perhaps you should try some spelling variations:
"cornelis gijsbert gerrit janse van steenis" » "cornelis gijsbert gerrit janse van steensel" (Expand Search), "cornelis gijsbert geert janse van steenis" (Expand Search), "cornelis gijsbert gerrit janse jan steenis" (Expand Search), "cornelis gilbert gerrit janse van steenis" (Expand Search), "cornelis ginsberg gerrit janse van steenis" (Expand Search)
"dscornelis gijsbert gerrit jan jan steenis" » "dscornelis gijsbert geert jan jan steenis" (Expand Search), "dscornelis gijsbert gerrit janse jan steenis" (Expand Search), "dscornelis gijsbert gerrit jang jae steenis" (Expand Search), "dscornelis gijsbert gerrit kuan jan steenis" (Expand Search), "dscornelis gilbert gerrit jan jan steenis" (Expand Search), "dscornelis ginsberg gerrit jan jan steenis" (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: (("dscornelis gijsbert gerrit jan jan steenis") OR ("cornelis gijsbert gerrit janse van steenis"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"dscornelis gijsbert gerrit jan jan steenis\") OR (\"cornelis gijsbert gerrit janse van steenis\"))".
• Removing quotes may allow a broader search: (( dscornelis gijsbert gerrit jan jan steenis ) OR ( cornelis gijsbert gerrit janse van steenis )).
• Adding a wildcard symbol may retrieve word variants: (("dscornelis gijsbert gerrit jan jan steenis") OR ("cornelis gijsbert gerrit janse van steenis"))*.