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