Perhaps you should try some spelling variations:
"raja mam mohon roy" » "raja mam cohen roy", "raja mam mon roy", "raja m mohon roy"
"raja ram mohan roy" » "raja r mohan roy", "raja ram mohan r", "raja ram mohan rai", "raja ram roman roy", "raja ravi mohan roy", "raja m mohan roy", "raja roy mohan roy", "raja _am mohan roy", "raja jam mohan roy", "raja mam mohan 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 ram mohan roy"))) OR ("raja r von rob")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"raja mam mohon roy\") OR (\"raja ram mohan roy\"))) or (\"raja r von rob\"))".
• Removing quotes may allow a broader search: (((( raja mam mohon roy ) OR ( raja ram mohan roy ))) or ( raja r von rob )).
• Adding a wildcard symbol may retrieve word variants: (((("raja mam mohon roy") OR ("raja ram mohan roy"))) or ("raja r von rob"))*.