This paper aimed to explore factors affecting the level of satisfaction among 82 students from two different classes at Vietnam National University Hanoi, International School when they participated in one hybrid learning course and one full online course with the same lecturer at the same time during the new normal period of Covid-19 pandemic in Vietnam. The factors were considered in the aspect of the interaction between teachers and students, the interaction among students, the interaction between students and content, and the interaction between students and technology. The students' satisfaction with the same subject (EAP - English for Academic Purposes) but delivered in two different learning platforms was compared and the students' barriers to the course were assessed. The answers of the studentrespondents were collected through a survey questionnaire consisting of a set of five-point Likert scale questions and one open-ended question. The results of the study revealed that the student's satisfaction with the course was at a high level, and the studied students were more satisfied with their learning experience in the full online course than in the hybrid course. The research findings also showed that the biggest challenge to these students was learner autonomy or the learning motivation. It was therefore recommended that the application of full online or hybrid courses should be guided with institutional support to improve learning opportunities for students and enhance learning outcomes and skills. 

Keywords: students' satisfaction, interaction, hybrid course, full online course, EAP