>Is there any way that the search strings can be longer than 10 characters? So it can have more than one word in the search?
Yes, but that would be part of the list and not of the Downloads itself. By that, I mean that it could come later on.
However, keep in mind that this is an exact match, so if you would enter two words, those two would have to be found as is within the search strings of the content. There is no need to proceed much more on that as we don't have thousands of entries in each content. So, usually, in one search with just a few characters, you can find your match in one click.