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