After convincing Ashkan Dejagah to play for his birth country's national team and the Vfl Wolfsburg player's great Team Melli debut, Queiroz already visited Belgium twice to see Dutch-Iranian Reza Ghoochannejhad in action.
The 24-year-old Mashad-born St. Truiden striker could debut for Iran in World Cup qualification in June, however, nothing has been officially confirmed yet.
Last weekend, Queiroz travelled to Sweden to first talk to Amin Nazari of Swedish giants Malmö FF, who didn't make the squad for Malmö's goalless draw against Gefle IF in their season opener on Monday despite good performances in preseason.
According to Iranian sportssite 'Khabar Online', the 18-year-old half-Iranian midfielder could be invited to Iran's training camp in May and appear in World Cup qualifying in June, should the legal and administrative issues be cleared until then.
Queiroz, however, went to see Örebro's 3-4 defeat to Åtvidabergs FF in Swedish's top flight, where 19-year-old half-Iranian striker William Cyrus Atashkadeh scored a brace.
Swedish sports website 'Expressen' reported on Tuesday that he was satisfied by Atashkadeh's performance, but that further steps still have to be overthought.
The half-Swedish youngster was quoted by the website expressing his happiness to be observed by a great coach like Queiroz, however, added he currently wants to concentrate on his Swedish U21 career before thinking about his senior national team future.
'Khabar Online' further reports the Portugese coach will now again make a journey to Belgium to observe Ghoochannejhad in St. Truiden's relegation playoffs before before travelling to the Netherlands, where an unnamed Iranian talent shall be scouted.
Finally the journey will lead the former Real Madrid boss to Germany, where he will observe a possible Team Melli candidate, probably Shervin Radjabali-Fardi, in second Bundesliga. The 20-year-old half-Iranian leftback is currently at Alemannia Aachen on loan from Hertha Berlin. However, also Eintracht Braunschweig goalkeeper Daniel Davari could be a potential target.