"Rong chơi miền chữ nghĩa" (Volume 1) ("Wander through the Realm of Words", Volume 1) is a three-volume book series by the scholar An Chi, bringing together a curated selection of his essays originally published as responses and linguistic explanations in newspapers such as Người Đô Thị, Đương Thời, and Năng Lượng Mới. The series aims to decode the origins, meanings, and interpretations of words, idioms, and place names in Vietnamese through a style of analysis that is lively, scholarly, yet accessible. Volume 1 opens this “wander through the realm of words” with engaging linguistic questions, ranging from simple to complex examples in Vietnamese. An Chi explains vocabulary, idioms, and everyday expressions, analyzing their origins and semantic shifts over time and across cultural practices. Under his pen, seemingly familiar questions—such as “Is Mão the Year of the Cat or the Rabbit?”—along with proverbs and idiomatic expressions, are reexamined from an etymological and linguistic perspective, allowing readers to learn while taking genuine pleasure in the exploration.