Every search requires a name if you want to revisit it. Ad-hoc searches can be created and not saved, however no actions can be taken on unsaved searches (exports, bulk operations, etc). By default Administrators, Compliance Officers, and Search Administrators have permission to view all saved searches. Exporters and Reviewers require the specific access to the search in order to access. Non-admin users are granted read-only rights and cannot modify the scope of the search; they are only able to perform the actions of their role: Export or Review. See the articles outlining Features available by role and Search Permissions.
Searching for phrases:
By default, search will look for each word within the search criteria entered for both simple and advanced searches. To search for specific phrases, simply encapsulate the phrase in double quotations marks ("").
Phrase search is available across all search entry options: keywords, From, To, CC, or BCC. They can also be used within lists.