Survival outcomes and prognostic factors after thoracoscopic pulmonary metastasectomy for hepatocellular carcinoma: a single-center experience from Vietnam - Chau, Thi Phu; Minh Tran, Luan Bao; Pham, Khang Phu; Nguyen, Quang Dang Viet (Video-Assisted Thoracic Surgery, 2026)