Micro learning model (micro learning) that first appeared in the 2000s has become increasingly popular in the field of education and training in recent times. Firstly used in continuing education in corporate settings, microlearning has since expanded to include other levels of education, including secondary school, vocational training, and higher education. However, in Vietnam, micro-learning is still a new concept and there has not been much research and application in practice. In this study, we analyzed 90 articles, conference papers, books and book chapters on undergraduate microlearning indexed by Scopus for the period 2002-2021. Based on bibliometric analysis and content analysis, this study will provide a rough picture of microlearning at undergraduate level, including research trends, document types, countries, affiliations, author, highly cited publications, research subjects and key attributes of microlearning.