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