Perhaps you should try some spelling variations:
graph ramsey » graphs ramsey, frank ramsey
john roy » john ray, john leroy, john rose
john roe » john rose, john rowe, john rolle
john rob » john robb, john r.b, john robst
kwon go » kwon o, kwon g, kwon ho
raja r » raja _, raja j, raja m
r kwon » _ kwon, o kwon, c kwon

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( graph ramsey ((((john roy) OR (john roe))) OR (john rob)) ) OR ( raja r kwon go )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( graph ramsey ((((john roy) OR (john roe))) or (john rob)) ) or ( raja r kwon go ))".
• Adding a wildcard symbol may retrieve word variants: (( graph ramsey ((((john roy) OR (john roe))) or (john rob)) ) or ( raja r kwon go ))*.