Perhaps you should try some spelling variations:
"dscornelis gijsbert gerrit janse van steenis" » "dscornelis gijsbert gerrit janse van steensel" (Expand Search), "dscornelis gijsbert gerrit janse jan steenis" (Expand Search), "dscornelis ginsberg gerrit janse van steenis" (Expand Search)
"cornelis gilbert gerrit dang van steenis" » "cornelis gilbert gerrit dang van steensel" (Expand Search), "cornelis gilbert gerrit dang fan steenis" (Expand Search), "cornelis gilbert gerrit tang van steenis" (Expand Search), "cornelis gilbert gerrit dang dang 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 janse van steenis") OR ("cornelis gilbert gerrit dang van steenis"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"dscornelis gijsbert gerrit janse van steenis\") OR (\"cornelis gilbert gerrit dang van steenis\"))*".
• Removing quotes may allow a broader search: (( dscornelis gijsbert gerrit janse van steenis ) OR ( cornelis gilbert gerrit dang van steenis ))*.