Given that no research has been conducted in the world or in Vietnam using the bibliometric method to synthesize documents related to OEP in higher education, as well as the fact that research on OEP is not particularly prominent or popular, we intend to review documents on open education activities to examine factors such as the number of studies on OEP conducted between 1979 and 2024. The quantity and trends in OEP research will assist academics and lecturers in assessing the value and function of OEP in expanding open education practices at universities and upgrading open access materials to the greatest extent possible in light of technology advancements. Bibliometrics is used to depict statistical data rather than describe it in the traditional fashion, allowing readers to quickly understand the evolution of OEP over time as well as the distribution network of OEP-related phrases. The most commonly appearing terms in OEP research were identified by analysing 310 benchmarked publications. The findings revealed that the survey identified major research trends, prominent organizations, and collaborative networks, with the United States and the United Kingdom having the largest effect. The research emphasized the significance of OEP in fostering fairness and innovation in education, and it argued for regulatory frameworks that facilitate the incorporation of technology into open education. Based on the findings of this study, policymakers may use it as a predictive document on OEP in the context of digital transformation, including how to adapt as resources become more open and available to more learners.