Hard to search for band's drum tabs

Why is it so hard to find drum tabs? When you search for a band, they always show: "song name" Drums (0) when they actually have drum tabs. The search engine needs some work to make it easier to find these drum tabs. I like it when i find drum tabs but it can be so time consuming and frustrating. I have to open each song to check for drum tabs since i cant trust the list. I have found that the total tabs listed can show: (band "zao" example) Circle II the Lustful: Autopsy 7 Total Tabs — Guitar (3) | Bass (3) | Drums (0).......when i went to school, 3+3=6 not 7, so i am guessung the other 1 is a drum tab.