Complete searches in a collection

System Information
  • Strapi Version: 4.6.0
  • Operating System: Windows
  • Database: Mysql
  • Node Version: 14.17.4
  • NPM Version: 6.14.14
  • Yarn Version: 0

Hello I would like to ask for help I am trying to do a search in a collection in this way books?_q=test in the collection fields it works but in the relational fields it does not look for information could you confirm me why it does not work?