This document contains advanced tips and methodologies used for searching Outlook Email system. It is a condensed version of the data found here:
https://support.office.com/en-gb/article/Learn-to-narrow-your-search-criteria-for-better-searches-in-Outlook-d824d1e9-a255-4c8a-8553-276fb895a8da?ui=en-US&rs=en-GB&ad=GB
and
https://support.office.com/en-us/article/-f83e8e60-0bab-47eb-8f6e-c2ecb73124d8
It is attached in PDF format so it can be saved locally if desired.