The document summarizes research on the effectiveness of English for Specific Purposes (ESP) courses in Vietnam. It finds that while ESP courses have many benefits, they have not been very effective for language acquisition. Interviews with ESP teachers and students found several reasons for this, including a lack of teacher training and experience in ESP, large class sizes, outdated materials, and insufficient focus on practice. The document concludes that in-service ESP training for teachers nationwide could help address these issues and improve ESP curriculum design and instructional practices in Vietnam.