Custom Fields in POst form not searchable

I have created a form for subscribers and authors to post to the site. Everything works as expected but the custom field I created have information that I need to be searchable (i.e. artist, Publisher, Character, etc.). Not even the terms entered into the Tag Field are able to be found doing a search.

The data entered into the Post Title & Post Content blocks are searchable.

I am not sure if there is a setting that I missed or not.

Any assistance would be greatly appreciated.

The page I need help with: [log in to see the link]