Perhaps you should try some spelling variations:
mohon roy » cohen roy
mam kwon » lam kwok, kim kwon
tam kwok » lam kwok, lai kwok, lau kwok
mon roy » von roy, kwon roy
raja m » raja _, raja j, raja r

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 kwon) OR (tam kwok)) go ) OR ( raja m ((mon roy) OR (mohon roy)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( raja ((mam kwon) or (tam kwok)) go ) or ( raja m ((mon roy) OR (mohon roy)) ))".
• Adding a wildcard symbol may retrieve word variants: (( raja ((mam kwon) or (tam kwok)) go ) or ( raja m ((mon roy) OR (mohon roy)) ))*.