How to Search for Emails in Gmail
If you have a lot of email, and you're trying to find a specific one, you can easily search through everything using the search field.
Some suggestions will automatically pop up as you type below the search field.
If you end up with too many search results, you can narrow your search using a variety of options.
The Search Options menu appears. You can refine a search by using the following fields:
Only the messages that fit the search criteria will appear in search results.