Historical documents play a decisive role in historical research. However, the method of mining and processing historical documents will make an important contribution to the results of historical research. Therefore, historical research in the digital age requires the application of modern text mining techniques that will enhance the value of research results. It is the combination of traditional research methods and modern analytical techniques for historical resources that has created an improvement in historical research activities at Can Tho University. The results of case studies on combining techniques of Text mining for historical documents at the National Archives Center also contribute to new development orientations in improving the quality of Vietnamese historical research activities at universities in Vietnam and many other universities in Asia. In the future, historical research activities will be associated with more modern research methods and processing techniques, contributing to improving research methods and enhancing historical scientific values.