Perhaps you should try some spelling variations:
mohon roy » cohen roy, mon roy
mohan rai » mohana rao, milan rai, mohan r
o mohon » _ mohonk
raja r » raja _, raja m
raja j » raja _, raja m
raja o » raja _, 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) OR (raja j)) mohan rai ) OR ( raja o mohon roy )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((raja r) OR (raja j)) mohan rai ) or ( raja o mohon roy ))".
• Adding a wildcard symbol may retrieve word variants: (( ((raja r) OR (raja j)) mohan rai ) or ( raja o mohon roy ))*.