Search for specific issues or volumes
To search for specific issues or volumes you can use search operators. If you are looking for a particular issue use the hashtag/pound symbol followed by a number, for instance to search for an infamous Superman issue you could enter the search terms "Superman #75" to narrow your search to that issue.
Similarly you can use the volume keyword to search for particular volumes of a series. Say you wanted to find issues from volume 1 of the Uncanny X-Men entering the search terms Uncanny X-Men volume 1 should bring issues from volume one to the top of the search results.