Searching Within Results in .NET Search Interfaces
Coveo .NET Front-End 12.0.8225+ (March 2016) You can use the Search Within Results link with an empty query.
The search within results filter is optional. Your Coveo administrator can enable it independently for each .NET search interface (see Activating Search Interface Options With the .NET Interface Editor).
To search within results in a .NET search interface
After performing a query for which you want to refine the results, click the Search Within Results link located below the search box panel and above the facets.
The search box is cleared and a message appears below the search box panel to indicate that the displayed results are restricted to the previous query.
Search Within Results link A search within results message
In the search box, enter the desired expression to refine the results, and then click Search.
Review your refined results.
The search within results filter stays active for subsequent queries so that you can continue to add expression and refine results further.
Click the [Clear All] link that appears at the end of the message to deactivate the search within results filter.