Do, Thi Kim Cuong, et al. “AN EXAMINATION OF READING TEXT DIFFICULTY IN THE VIETNAMESE NATIONAL HIGH SCHOOL GRADUATION CHINESE EXAM: EVIDENCE FROM THE 2025 TEST”. Ho Chi Minh City University of Education Journal of Science, vol. 23, no. SI2, May 2026, doi:10.54607/hcmue.js.23.SI2.5578(2026).