You weren't in the USA, so you can't use their system. You need to log time as per Thai regulations if you want a Thai license. The bottom line is you can log whatever you want but it's up to the person reading it to decide if it's acceptable or not. That's why a lot of people who train in the US have a second logbook of they're not from there.
Your only legal option is probably to rent a plane for 30 hours.