Following Volume 1, "Rong chơi miền chữ nghĩa" (Volume 2) delves more deeply into the original meanings and variant senses of Vietnamese words, especially those that are commonly misunderstood. The author explains how a word, once absorbed into everyday usage, can shift in meaning due to habitual use, regional variation, or broader cultural and historical influences. By comparing these usages with principles of etymology and Sino-Vietnamese vocabulary, he clarifies numerous linguistic misconceptions.