Addressing the event, VBFA President Nguyen Van Tuan congratulated the Bulgarian people on the occasion that honours the Kyril and Mephodi brothers who invented the first Slavonic letters.
In addition, it has helped improve occupational skills for more than 20,000 Vietnamese workers.
In turn, the Bulgarian Ambassador said the annual event contributes to friendship and cooperation between the people of Viet Nam and Bulgaria.
By Vien Nhu