This name can also be written as สมชัย, formed from Thai สม (som) meaning "worthy" and ชัย (chai) meaning victory (pronounced /som˩˩˦.ˈt͡ɕʰaj˧/). [noted -ed]
Somchai Subpherm is a Thai football coach. Somchai lead Bangkok University to the league championship in 2006 and then took them on their first adventure of Asian Football in the AFC Champions League the following year.
Sources: https://www.thenamemeaning.com/somchai/
https://themeaningofthename.com/somchai/
https://www.babynamespedia.com/meaning/Somchai