It is obvious that communication among countries has greatly improved and become
more important, and that one of the factors has contributed for this process and development is
language. Vietnam is not an exception for this, since the open door policy has been carried out
especially, at the time of integration into the global development. People and the government
have been aware of the significance and necessity of foreign languages, especially English, an
international language. Teaching and learning of English in Vietnam has undergone changes
to find the efficient ways for the language learners. It is also realized that there are many
teaching methods, and it seems that no specific one has proved the bestfor all learners, and
nowadays, the combination of different methods has been suggested for language teachers.
There is also the fact that, although Vietnamese learners of English now have many good
opportunities to acquire this language, they still are not very successful, this can be clearly
seen in their speaking skill. This problem has raised a question for many linguists and teachers
to find the best solution to the language acquisition in general and speaking learning in
particular.
It is also said that one of the problems that cause difficulties for the learner is that there
exist the difference among languages and these are what the contrastivists are concerned with.
And contrastive analysis (one of the linguistic branch) has proved its influence in language
teaching.