Coach Park Hang Seo has called up 48 players for a training camp to prepare for next year's Southeast Asian Games, where the U22 team will attempt to defend their crown.
Thanh secured his second national title in a time of 2hr 36.56min, marking a remarkable return to running after about two years of absence, on Lý Sơn Island of Quảng Ngãi Province in early July.
Romelu Lukaku scored as Inter Milan defeated Bayer Leverkusen 2-1 in Monday's Europa League quarter-final in Dusseldorf, becoming the first team through to the last four of a mini tournament behind closed doors in Germany.
A number of amateur football tournaments have been suspended due to the recent threat of COVID-19.
The 21- year-old defender returned home after 11 months on loan at SC Heerenveen in Holland from Ha Noi FC and will be quarantined for 14 days.