Perhaps you should try some spelling variations:
"raja mam mohon roy" » "raja ram mohan roy", "raja mam cohen roy", "raja mam mon roy", "raja m mohon roy"
"raja r von rob" » "raja r von robo", "raja r von rom", "raja r von roh", "raja _ von rob", "raja j von rob", "raja m von rob", "raja 2 von rob", "raja 1 von rob"

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 mam mohon roy") OR ("raja r von rob")).
• Removing quotes may allow a broader search: (( raja mam mohon roy ) or ( raja r von rob )).
• Adding a wildcard symbol may retrieve word variants: (("raja mam mohon roy") or ("raja r von rob"))*.