Chung on December 25 made a list of three goalkeepers, six defenders, 10midfielders and four strikers after nearly four weeks of training in Hanoi.
He called up a number of young players who will go along with him to protecttheir title at the Southeast Asian Games next May.
In three weeks in Spain, Vietnam, apart from intensive training, will have fourfriendly matches with three clubs who are playing for the second divisionleague and one with a first-division side.
Vietnam are in Group C with Japan, the Republic of Korea and Myanmar, with thetwo first considered powerhouses who have dominated the continent for yearswith Japan going into the competition as defending champion.
The Southeast Asian champion hope their performance at the tournament will gainthem a place in the 2023 World Cup for the first time in history.
At the competition which will be hosted by India from January 20 to February 6,five teams will qualify directly for the World Cup via the knockout stages, andtwo more teams will advance to the inter-confederation play-offs./.