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