If you're working within a FlexSearch project, you can search on a Saved Search. Searching Saved Searches can be used as criteria in Advanced Searches, allowing you to perform powerful operations for quality control, search roll-up, and case convenience.
In addition to building queries with the Advanced Search Builder, you can use the Search bar with the syntax "saved_search_name:". This syntax can also be used with the boolean operators: AND, OR, & AND NOT.
You can do QC for a document review, pull together several Saved Searches into one, or add criteria to a search without the need to delete and recreate the search. Searching Saved Searches can be a powerful tool.