Exploratory learning depends on several e-learning technologies to enable students to direct their learning. However, the educational search engines of e-learning platforms are inspired by exploratory learning approach. Thus, their search is characterized by learning and investigation. The purpose of this paper is to explore what is considered to be deep connection between exploratory search and educational search engine since they are two complementary subjects. This relation remains at the heart of the development of exploratory learning and investigations. The paper concludes by highlighting the importance of the learning and investigation of knowledge in exploratory search for educational search engine and give other perspectives to improve this practice.