This is a userscript that lets you mark questions as commonly used duplicate targets, and replaces the default question search in the close dialog with one that searches through your marked duplicate targets.
A new button is added below the "favorite" button:
Once a question has been added to your collection, you can associate keywords with that question. These keywords are intended to make the question easier to find.
Bug reports and feature requests
Please post bug reports and feature requests on my GitHub issue tracker.