How Do I Search/find An Email Received On My Yahoo Account?

I just have a few days using my yahoo e-mail account, I used to have hotmail.
I’ve been trying to find some emails that I received, so I put the sender’s email (ie: abc1123@yahoo.com) but the email search function does not work because it won’t show any results just this message:
“No emails were found matching your search”
Please help. I run my business on yahoo, actually switched from hotmail to yahoo thinking it will work better, but if I’m unable to find my clients email this account will not work for me