How to find / understand research in other languages when you don't know that language?
I would ask a colleague which does speak Thai, and ask him if there are any relevant Thai publications you need to be aware of. Ofcourse this colleague needs to be in the same field you are interested in. If he or she does not know of any relevant literature, this might indicate that you are not missing any relevant research.

In addition, when you are looking for papers yourself, I would Google translate the titles of the papers, and if they seem interesting I would ask a native speaking colleague to translate the abstract. If it still is interesting then you ask your colleague to read the paper together with you.