This document provides guidelines for writing a contrastive analysis essay comparing linguistic aspects of English and Vietnamese. It recommends choosing a specific topic that focuses on one linguistic aspect, such as idioms or thematic progression patterns. Sample topics are provided. The essay should include an introduction with background, thesis, and research questions; a literature review of relevant studies; a methodology section; a contrastive analysis identifying similarities and differences; a conclusion; and a discussion of implications. Academic language, avoiding plagiarism, and using scholarly resources are also addressed.