Perhaps you should try some spelling variations:
"cornelis gilbert gerrit jan van steensel" » "cornelis gilbert gerrit jan jan steensel" (Expand Search), "cornelis gilbert gerrit janse van steensel" (Expand Search), "cornelis gilbert gerrit dang van steensel" (Expand Search)
"cornelis gilbert geert jan van steenis" » "cornelis gilbert geert jan jan steenis" (Expand Search), "cornelis gilbert geert janse van steenis" (Expand Search), "cornelis gilbert geert dang van steenis" (Expand Search), "cornelis gilbert geertz jan van steenis" (Expand Search), "cornelis gilbert geest jan van steenis" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"cornelis gilbert gerrit jan van steensel\") OR (\"cornelis gilbert geert jan van steenis\"))~".
• Removing quotes may allow a broader search: (( cornelis gilbert gerrit jan van steensel ) OR ( cornelis gilbert geert jan van steenis ))~.
• Adding a wildcard symbol may retrieve word variants: (("cornelis gilbert gerrit jan van steensel") OR ("cornelis gilbert geert jan van steenis"))*.