For example, I have a folder `new_folder` and I have a lot of folders and files in this folder. I want to list all the files that have `math` in their file names. So files like `maths.txt`, `text.mathabc` would satisfy the requirement, and these files may be in some sub-folders of the `new_folder`. Is there a command that I can use to perform this action under `new_folder` as the current directory?