Can anyone recommend a vietnamese book or books that talks about how to let go of all negative things in the past, negative thoughts and actions and to avoid anything negative for the well being of one self. Like a self motivational book to boost one’s mentality and health.

I am not great at reading in vietnamese therefore I can not judge if the book will be a good read.
This book would be for another person who does know how to read in viet very well and that is why I need your recommendation. I am trying to help this person change or improve their ways of thinking, speaking and living to better their overall health. The book is for a person in their late 60s who grew up a very traditional Vietnamese life style. This person had been through brain surgery a year ago and can’t seem to get pass the negative things. I am not very fluent in vietnamese to convey what I have learned and experienced into full vietnamese, and that is why I need a really good book or two. Thank you in advance.