... (1969), Levision (1983), Brown & Yule (1983) and others In Hymes’s definition (1964, p 13): “Speech acts are defined as the acts we perform when we speak” such as giving reports, giving advice, agreeing, ... and suggests further studies PART II: DEVELOPMENT CHAPTER I LITERATURE REVIEW This chapter provides the literature review including the notions of speech acts theory, theory of politeness strategies, ... significance and method of the study Also, an overview of the rest of the paper is provided to orientate the readers throughout the study Rationale of the study Vietnam is on the path of global integration...