TY - JOUR DO - 10.22161/jhed.8.3.1 UR - http://dx.doi.org/10.22161/jhed.8.3.1 TI - Selection of Exercise Systems and Development of a Training Plan to Improve Speed-Strength for Male Volleyball Athletes Aged 14–15 at the Hanoi Sports Training and Competition Center T2 - Journal of Humanities and Education Development AU - Can, Nguyen Van AU - Thang, Truong Duc PY - 2026 PB - AI Publications SP - 01-06 IS - 3 VL - 8 SN - 2581-8651 ER -