Richarlison, who made the switch from Watford in July, is Everton's top scorer in the league with seven goals despite serving a three-match ban after being shown a straight red card against Bournemouth in August.
"I'm happy with him but I still think he can do better in terms of goals, he certainly has the quality," said Silva.
The 21-year-old scored his first goal in four matches to rescue a point at home for Everton against Newcastle and Silva lamented their wasteful in front of goal.
"I agree we should probably take more of our chances," the manager added. "We created enough in the first half against Newcastle to have won the game, but points in the Premier League are not always easy to come by."
(Reporting by Simon Jennings in Bengaluru; Editing by Peter Rutherford)
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