Nuno wants to sign at least two more players before the August 8 transfer deadline.
The Molineux outfit have signed Jesus Vallejo on loan from Real Madrid and permanently signed Leander Dendoncker and Raul Jimenez after successful loan deal.
Nuno said: "We feel that we still need two players.
"We're going to bring in two players [to get] 18 players that we want to work with every day, plus the U23s and the young players that we want to develop.
"All the clubs are expected to make decisions [on players]. But we've done our homework - we find our targets and then it's the process of negotiating.
"We are still on time in bringing players that we want to bring in. We always want to bring quality to the club."
