The book "Khmer - Vietnamese vocabulary (common words)" is designed to serve a large audience of people living in areas where there are ethnic Khmer people so that we can look up some more common words in communication, to enhance the long-standing solidarity between the two ethnic groups of Khmer - Vietnamese. The compilation team has selected the most common words that are used in everyday life accompanied by transliteration and brief translation. The book has about 15,000 thousand words covering topics: politics, economy, science, military, commerce, culture ...