Old af DMs

Please give me a means by which I may search for keywords or phrases and all my direct message conversations, that I've ever had (whether or not it's so old it's not even on the list of recent DM convos), containing that word will show up.
Also, a feature that allows me to search for people via their 4-digit number or some of their numbers, their Discord name, or nicknames they may have in various servers.
<# <3 <#