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