Perhaps you should try some spelling variations:
raja ramsey » frank ramsey, graph ramsey
ramsey john » ramsay john, casey john
john robb » john rose, john ross, john rowe
mohon roy » cohen roy, mon roy
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 john robb ) OR ( raja a mohon roy )).
• Adding a wildcard symbol may retrieve word variants: (( raja ramsey john robb ) or ( raja a mohon roy ))*.