Perhaps you should try some spelling variations:
mohan rai » mohana rao, milan rai, mohan r
r mohan » _ mohan
mon roy » mohon roy, kwon roy
von roy » von rom, von rob, von roh
raja r » raja _, raja j, raja m
raja o » raja _, raja j, raja m

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 r mohan rai ) OR ( raja o ((mon roy) OR (von roy)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( raja r mohan rai ) or ( raja o ((mon roy) OR (von roy)) ))".
• Adding a wildcard symbol may retrieve word variants: (( raja r mohan rai ) or ( raja o ((mon roy) OR (von roy)) ))*.