Chelsea had a £22million bid rejected for Tottenham star Luka Modric, while they have been linked since Villas-Boas' arrival from Porto with some of their new manager's former players, including striker Radamel Falcao.
"You know the kind of moves this club does," Villas-Boas said after being officially unveiled at Stamford Bridge.
"I won't speculate on names. All of them are interesting players: Modric, Falcao, (Fabio) Coentrao.
"If they can add to the squad..."
But he added: "Everyone in first, then decision making. At the moment, we're stopped in time."