The Tale of Kieu is the most famous ancient poem of the great poet Nguyen Du. The original version of this work was written in Nom (an ancient Vietnamese script). Until the Vietnamese language (in the latin system) was popularized, The Tale of Kieu was transcribed and published by researchers, so far there have been many different versions. Because there are no originals, the later Kieu versions have differences from the language used by Nguyen Du due to the wrong engraving, wrong arrangement, sometimes corrected according to the understanding of posterity. It is these differences that hinder the reader to approach and understand The Tale of Kieu. Researcher Bui Thiet and his colleagues have been researching and collecting ancient languages used 200 years ago (the era of poet Nguyen Du), with the desire to bring a version of the Story of Kieu exactly as original as possible.