The discussion centers around the difficulty of accessing the book "Superstring Theory" by Green, Schwarz, and Witten in Vietnam, with a user seeking an online version due to challenges in purchasing physical copies. Participants express skepticism about the availability of a legal online version and suggest considering alternative English books. There is a debate about the importance of language proficiency for studying complex subjects like physics, with some advocating for improving English skills through reading while others emphasize the challenges non-native speakers face. The conversation highlights cultural and logistical barriers to accessing educational resources in Vietnam.