Perhaps you should try some spelling variations:
graph ramsey » graphs ramsey, frank ramsey
ramsey john » ramsay john, casey john
mohan roy » mohon roy, mohan r, mohan rai
john rob » john robb, john r.b, john roe
m mohan » _ mohan, r mohan, b mohan
raja m » raja _, raja j, raja r

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 rob ) OR ( raja m mohan roy )).
• Adding a wildcard symbol may retrieve word variants: (( graph ramsey john rob ) or ( raja m mohan roy ))*.