Perhaps you should try some spelling variations:
mohan rai » mohana rao, milan rai, mohan r
mohon roy » cohen roy, mon roy
r mohan » _ mohan
raja r » raja j, raja m
raja o » raja j, raja m, raja g

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