Search the Discography by filling in the desired Areas to be matched and select which Artists to get the information for. When the Search parameters have been set, simply 'Apply' the Search to show all the entries in the Discography that match the criteria.
Note that the Search uses partial matching so that you only need to put in part of a word to match. (eg. Searching for 'aust' in the Country will result in all entries from 'Austria' and 'Australia')