Because things are running quicker now I increased the search range to 10 years.
That doesn't mean you can't see threads older than 10 years. You could set a range "older than 5" and leave the "newer than" blank in both boxes. That would return results between 5 years and 15 years old.
It's set to return 100 results max per search. See the Advanced Search tips, they really help.
You can select # of Results per page and whether to show a post Preview