In total, 18 Ozonesondes were launched during July 2 through August 9, 2018.
Since some of ozonesodne observation were conducted in Viet Nam as a part of
project SHADOZ (Southern Hemisphere ADditional OZonsodes;
https://tropo.gsfc.nasa.gov/shadoz/index.html), where usualy twice-monthly
ozonsonde observations have been performed, several data are available 
through their site.
Currently, nine (9) ozonesonde data taken during the YMC-BSM 2018 campaign
period are available from the SHADOZ site.