Perhaps you should try some spelling variations:
graph ramsey » graphs ramsey, frank ramsey
raja ramsey » frank ramsey
mohon roy » cohen roy, mon roy
john roy » john ray, john roe, john rob
a mohon » _ mohonk
raja a » rajan a, rajah a, raja _

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: (( ((raja ramsey) OR (graph ramsey)) john roy ) OR ( raja a mohon roy )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((raja ramsey) OR (graph ramsey)) john roy ) or ( raja a mohon roy ))".
• Adding a wildcard symbol may retrieve word variants: (( ((raja ramsey) OR (graph ramsey)) john roy ) or ( raja a mohon roy ))*.