Complex sentence: He was discovered by a Russian pianist, Isaac Katz, on a visit to Vietnam in 1974, which allowed him to continue with his advanced training at the Moscow Conservatory in Russia with Vladimir Natanson, a pupil of Samuil Feinberg, and with Dmitri Bashkirov.
Split into simpler sentences: He was discovered by a Russian pianist, Isaac Katz, on a visit to Vietnam in 1974, who helped him to pursue his advanced training at the Moscow Conservatory in Russia. In Moscow, he studied with Vladimir Natanson, a pupil of Samuil Feinberg, and subsequently with Dmitri Bashkirov.