When I get high I can speak fluently

When I get high I can speak fluently This happen like a few months ago when I got really high. Usually when I get high I can think and concentrate super well and I just focus on my speaking pattern and my vocal cord and adjust the wind and my speaking just to the right sort of way and suddenly, I'm speaking and rapping and I was so fucking happy that day I thought I finally fix my stuttering I was crying tears of joy. But after I fall asleep that night and woke up I wasn't high anymore and lost that focus and I just came back to my normal stutting. I haven't got that high in a long time but I would want to learn more about how I did it again, maybe if I find some good weed but from where I'm from weed is crap here (Thailand)