Omeka- S Advanced search by type


Hi , im wondering how could i modify the advanced search , i mean , i modify the text from , search by type but from the sql table , now i wanna show just the items that i use ,for example , i dont wanna show the e-mail or the dataset text , how could i modify that , i was thinking about a select from … where id = ( specific id from the omeka_item_type but i can´t find where or how can i make that )


Or if someone has an idea to share or to get it easily