Use the dropdown lists to filter the resources. The result list gets updated as soon as you select a filter option.
Your filter choice also reduces the available options in the other filter options to the values matching the entries in the result list.
Example: if you select 'Imagineer' from the 'Role' filter the 'Person' filter will get updated to contain only persons which are imagineers.
The text filter searches several fields of each entry for matches with the given text:
Please note that DIX is not able to search the complete text of an entry (yet) since only small excerpts are stored.