The Automated information retrieval has appeared with the huge production of documents stored digitally, it allows you to find documents relevant to a user query formulated by keywords. The use of the neighborhood words of query can improve the relevance of research. The proposed method of representation of the documents has the advantage of integrating the information in its model of the neighborhood of terms. We evaluated our approach in terms of research relevance also the time of indexing and research. The obtained results show a remarkable improvement in the relevance due to the use of the neighborhood of the terms, and this hasn't influence on the indexing and research time that stay so quick.