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