There is currently an ebay listing which suggests the 1995 THX CVD Thai release may have Thai dubbing and Thai subtitles?:-
^ the seller seems to specialise in Thai media sales, so it could well be worth reaching out to him with any questions for more information.
Good luck with it - and please post up any info on the release if you find anything (or for other Thai releases too). 👍
I’ve added some edited images from it to The Original Trilogy box set releases on home video tape: 1988 to 2000 thread.