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