Perhaps you should try some spelling variations:
"cornelia gijsbert gerrit janse van steensel" » "cornelia gijsbert geert janse van steensel" (Expand Search), "cornelia gijsbert gerrit janse jan steensel" (Expand Search), "cornelia gilbert gerrit janse van steensel" (Expand Search)
"cornelia ginsberg gerrit jan van steenis" » "cornelia ginsberg geert jan van steenis" (Expand Search), "cornelia ginsberg gerrit jan jan steenis" (Expand Search), "cornelia ginsberg gerrit dang van steenis" (Expand Search), "cornelia ginsberg gerrit tang van steenis" (Expand Search), "cornelia ginsburg gerrit 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: "((\"cornelia gijsbert gerrit janse van steensel\") OR (\"cornelia ginsberg gerrit jan van steenis\"))~".
• Removing quotes may allow a broader search: (( cornelia gijsbert gerrit janse van steensel ) OR ( cornelia ginsberg gerrit jan van steenis ))~.
• Adding a wildcard symbol may retrieve word variants: (("cornelia gijsbert gerrit janse van steensel") OR ("cornelia ginsberg gerrit jan van steenis"))*.