On a Facebook Community page, what category do I choose if I want the drilldown to be cancer?

[More Mozz]

I have a Facebook page and I want it to be searchable like some others by key words. There is a place in the page setup where I can choose a category, with sub categories (alot like YA) but I can't figure out which one drills down to Cancer or even this particular type of cancer. Yet, if I enter "ACC" or Adrenal Cortical Cancer on the Facebook search bar, it comes back with matches, so I know there's a way to do it. What am I doing wrong?
Oh, I'd rather do search words but I thought I couldn't. How do I do that?

[Hannah]

I'm confused. Do you want to set the search words or the category of the page?
The category for the page would be community. The search words would be cancer, medicine, community, disease etc.