In traditional linguistic research there are many works on text analysis, which focus only on the formal properties of language divorced from their communicative functions. Modern linguistic tendency of research focuses on discourse analysis, which is functional analysis of discourse involving the analysis of language in use. It can be said that language in the works of discourse analysis has been studied in both form and meaning in distinctive situations and contexts. Emphasizing as above, it is to be noted that discourse analysis, although a challenge to researchers and learners, has attracted much of their attention.
Nowadays Vietnam is step by step adhering to the development in the world, so it accepts, signs, ratifies or accedes many International Declarations and Conventions, among these a number of instruments on Human Rights. We all know that the field of human rights is very new in Vietnam and researches on it are in the beginning steps only. Due to the importance of human rights issues, they not only interest the people working in legal field, but also us  those who are working in linguistic field. It might be agreed that human rights issues concern all.
The above-mentioned facts lead me to choosing this topic. Additionally, the study would be considerably helpful for my translating documents on Human Rights.