During their training camp in Japan, the national U16 team did not have the best conditions due to the influence of typhoon Jebi, with many sessions played on an artificial pitch.
However, head coach Vu Hong Viet is pleased with the results, especially the friendly matches against strong rivals, Vietnam U16s lost 4-1 to U18 Naebashi Ikuhei, drew 0-0 with U18 Fukushima and were defeated 3-0 by U18 Shimizu S-Pulse.
The players have gained more experience after those matches and have improved their fitness and mental strength, he said.
Mr Viet said he and the coaching board will make some tactical changes to prepare for the AFC U16 Championship Finals.
The AFC U16 Championship Finals are set to get underway in Malaysia from September 20 to October 7. The top four teams will win places at the 2019 FIFA U17 World Cup Finals in Peru.
Vietnam have been lumped in with strong contenders Iran, Indonesia and India in Group C of the AFC U16 Championship Finals.