Salah has likened the Dutchman to departing teammate Bobby Firmino.
He said on Stadium Astro: : "He's kind of like Bobby. He likes to drop deep and sometimes he plays as the No. 8.
"He knows how to play football, that's for sure. I'm not concerned if he doesn't score, as long as the team is winning then he's going to score goals anyway."
Salah added: "I always speak with him. He's a really clever guy and he always wants to learn. I always tell him don't listen [to any criticism], just play your football. Don't worry what people say if maybe you're not scoring a lot [at times], that's my advice to him.
"Just play your football and relax, enjoy your role in the team."