Is there a way in TinyMCE if I type MY-TEXT then it makes it bold? or if I enter My Text manually then it converts to bold automatically?
I tried adding tag but that does not work
The textpattern
plugin will do what you want:
https://www.tiny.cloud/docs/plugins/opensource/textpattern/
In your screenshot you appear to be trying to type HTML into the WYSISYG view of TinyMCE - that won't work. There is a code
plugin that you can use to insert HTML code into TinyMCE.
One last note - you appear to be using TinyMCE 4 and that is no longer a supported release of TinyMCE after 31-Dec-2020 so you may want to look at moving to TinyMCE 5.