I was making a plugin for my company and they have a weird demand. So, how can we do live search at the backend (not frontend) for all the topics? What I want is when someone types a word at Title input, it should search all the previous title and prints all the title below the Title box. Without reloading the page and with AJAX. It can be done on PHP but I need to do it with WordPress too. Like The picture below, when I type some words in title and AJAX should search older Title and show below in the Yellow space.