Télécharger Google Chrome Pour Pc Windows 10 64 Bits Offline

I can search fine on my computer, but on my iPhone, when I try to search for an email from a few days ago, I only get results from a year or more ago. I tired searching all mailboxes as well as individual mailboxes. Where are these emails being stored so that iPhone mail search cannot find them? I have the most recent IOS software installed and tons of cloud space. This has plagued me for years already through multiple phones. Thank you for any help.