Thai people like to use มั้ง (mang). It's a particle to show uncertainty which is rarely taught in Thai books.
Main youtube video: https://www.youtube.com/watch?v=HN3a2JJAgfQ&feature=youtu.be
Follow along with this document:
https://docs.google.com/document/d/1Hz72mc_CDtQj-uTeqkI63tOv64wQ8Dj8Kw577BMXOV4/edit?usp=sharing