The Search Activity tab includes up to 1000 of the most recent searches that users in your organization ran over the last six months, regardless of the search status. You can rerun a search to load the initial results, which are stored for 7 days. If the results are no longer available, a message advises you to run a fresh search.
To rerun a recent search:
Select Investigate > Search in the main menu to open the search page.
Select Search Activity from the options menu at the top right of the page.
Locate the search in the list of queries.
Click the query in the Search Activity column or select Rerun from the options menu at the end of the row.