Search not work correctly

If I go to: Actions > Downloads, it’s lists all the documents that have been downloaded. I want to search that list of documents using the search function at the bottom of the report. I have the report showing data for the month of September 2014. When I do a search for a filename, it doesn’t find anything. If I change the date range to say September 19, 2014, and search using the same filename, it returns results.

How do I fix this so that the search shows results no mater what date range I choose?

maybe After the top 500 or top 1000 rows, Piwik automatically groups pages, keywords, websites, etc. under the label "Others"; How do I force Piwik to not limit the data? - Analytics Platform - Matomo