The best way to expand a search in the example you show above is to not set the 001 at all.. and to conduct your search with just the key words..
For example if I wanted say, the Album in seperate tracks of the
www.pyromusic.net and the free Aussie Metal Compilation I wouldnt add the track numbers to my search.
Aussie Metal Compilation
Another way I could add certain tracks to this search would be by adding this symbol infront of words or numbers I want included in my search. ~
This should be used under the name/title, in the second bar
Aussie Metal Compilation
~01 ~05
No commas, just a space with the symbol directly infront of the word or numbers I wanted Included.
Hope this helps ya a bit to refine your searches..