You may further add filters to your Outlook search function to locate specific email items much more quickly. Microsoft Outlook features a search option that helps you find email items based on keywords. These workarounds apply to Microsoft Office 365, Outlook 2019, 2016, and 2013. It also describes workarounds on ‘how to fix Outlook problems’.
Summary: This blog outlines Microsoft Outlook search problems such as ‘Outlook search not working’ and ‘returns no or incomplete results’.