The doctoral thesis of the student Khitam Abdulnabi Salman was discussed at the Institute of Informatics for Post-Graduate Studies at the University of Information Technology and Communications. The thesis, entitled “Collecting Arabic Documents Using Approximate Groups and Mining Maximum Vocabulary Groups”, came in the field of computer science, as technological solutions were proposed based on new algorithms. The thesis developed solutions to address the limitations facing the processes of collecting Arabic documents in the fields of information retrieval, data mining, Arabic search engines, sentiment analysis, topic modeling, document summarization, and user review analysis. At the end of the discussion, the student Khitam Abdulnabi obtained a doctorate with a very good grade.