Outlook Search Criteria

Type this To find this
bobby moore Items containing both bobby and moore, but not necessarily in that order.
"bobby moore" Items containing the exact phrase bobby moore. Note the use of double quotes so that the search results match the exact phrase within the quotes.
hasattachment:yes Items that have attachments. You can also use hasattachment:true to get the same results.
subject:"bobby moore" Items whose subject contains the phrase bobby moore.
subject:bobby moore Items with bobby in the subject line and with moore anywhere else in the document.
hasflag:true Items that are flagged for follow up.
subject:status received:May Items received from anyone during the month of May (any year) where the subject contains status.
bobby AND moore Items containing both bobby and moore, but not necessarily in that order. Note that logical operators such as AND, NOT, and OR must be in uppercase letters.
bobby NOT moore Items containing bobby, but not moore.
bobby OR moore Items containing bobby, moore, or both.

Reference

Learn to narrow your search criteria for better searches in Outlook