ChatGPT is seen as an Artificial Intelligence application of OpenAI in the industrial era 4.0. ChatGPT has been identified as possibly being used in a variety of disciplines, including education. Previous research has shown that employing ChatGPT as a learning helper can help students enhance their learner autonomy, research, and scholarship. Furthermore, studies discovered that ChatGPT poses several obstacles to learners, particularly those beginning to write, such as illusions and potential illicit authorship and copyright. Consider that there are few studies conducted in Vietnam on this topic. This study aims to identify the limitations of Chat GPT that people typically encounter when studying writing, particularly in the Research Writing Course, and explore whether Chat GPT helps learners improve writing outcomes. The author discovered qualitative data from interviews with seven Master Course students, indicating that despite the numerous problems that students frequently face when utilizing ChatGPT, this platform can help them improve their writing abilities.