This study focused on finding out the criteria to evaluate research projects in education. We used a mixed methods research, including a literature review, focus group interviews with experts, and a survey of 140 lecturers from 5 universities of education in Vietnam and 33 lecturers who are teaching four majors from the University of Education, Vietnam National University. The necessity, suitability, and reliability of the set of criteria in evaluating the thesis in the field of educational science were examined. Two independent experts reviewed 146 master theses based on the set of criteria. The results showed that the evaluation of the 2 experts for 38 evaluation criteria is very similar, matched 85.6% to 100%. The Kappa correlation coefficient was above 0.7. The set of criteria is highly reliable in evaluating the quality of scientific projects.