Hi Andoheb,
In your Outlook Deleted Items folder, it contains every folder’s emails after they are deleted. The best way to find any particular email from the Deleted Items folder, you need to type in the related keyword of that email content. Like, you can type in the subject line content of an email and hit the enter key to make them appear in the Deleted folder.
See the screen shot for reference.
Thanks & Regards
Anjlua