This addon will help you find raid groups easily.
You enter the name of the desired raid in the filter and if anything is written in the chat under that name, it will be displayed in yellow.
Change the settings as follows: Chatter settings >>> Highlights >>> Output >>> Mark Chat
Also u can there add words and remove words which u want to display

Download link : https://www.curseforge.com/wow/addon...r/files/443809
Download for 3.3.5 version