troubles around using the underscore "_

[as-muncher]

When I search on btdig say "a_b" without the quotation marks, where "a" and "b" are two separate words, but that the search term I am looking for is the one term together, joined by an underscore, btdig comes up with searches for "a" and for "b" when the "relevance" tab is selected, but doesn't show "a_b". I don't want btdig to treat the underscore as a space. If my torrent search was for "a b" then I would put the quotation marks. But I need btdig to not treat it as a space.

[as-muncher]

Even using the quotation marks doesn't solve the problem. For instance, same results if I do "a_b" or if I do a_b as a search term: btdig will show me results such as "a b" with a space in there, even though I put "a_b" just like that, in quotation marks. If I put those quotation marks, I am looking for exactly that.