CVNSS4.0 typing approach is superior to Telex and VNI... It has 40 rules, yet it reduces typing time by 15-25%. This typing technique was born in March 2020 and was formally granted a copyright certificate number 1850/2020/QTG by the Ministry of Culture, Sports, and Tourism's Copyright Office. A few weeks later, it was implemented into an online converter between CQN, CVN, and CVNSS4.0 by programmer Hoang Ha (in Japan). You may learn how to convert at http://chuvnsongsong.com and copy the conversion results wherever you like. The CVNSS4.0 typing technique is now included in the EVKey percussion for computer usage. The 'Shortcut Table' of this percussion has a vast capacity, comprising the whole list of almost 30,000 relevant and non-significant syllables in the CVNSS4.0 typing technique, which is why it is only included with EVKey. CQN should be used instead. EVKey is a version made by programmer Lam Quang Minh that is based on Unikey's open source code. However, EVKey offers greater functionality and solves many problems that Unikey cannot.

Cvnss4.0 is a very short way of writing Vietnamese, without diacritics and accents, using only 26 letters on the common English-US keyboard.