Filter function do not work...What am I missing? (Returns empty)

defmodule Ampldev.Syllabuses.GySeCourse do
  # This turns this module into a resource
  use Ash.Resource,
    data_layer: Ash.DataLayer.Ets

  attributes do
    attribute :code, :string do
      primary_key? true
      allow_nil? false
    end

    attribute :name, :string do
      allow_nil? false
    end

    attribute :central_content, {:array, :string}
  end

  actions do
    defaults [:read]

    read :search_course_name do
      argument :name, :string do
      end

      filter expr(contains(^arg(:name), name))
    end
  end

  code_interface do
    define_for Ampldev.Syllabuses
    define :search_course_name, args: [:string]
  end
end

defmodule Ampldev.Syllabuses.GySeCourse do
  # This turns this module into a resource
  use Ash.Resource,
    data_layer: Ash.DataLayer.Ets

  attributes do
    attribute :code, :string do
      primary_key? true
      allow_nil? false
    end

    attribute :name, :string do
      allow_nil? false
    end

    attribute :central_content, {:array, :string}
  end

  actions do
    defaults [:read]

    read :search_course_name do
      argument :name, :string do
      end

      filter expr(contains(^arg(:name), name))
    end
  end

  code_interface do
    define_for Ampldev.Syllabuses
    define :search_course_name, args: [:string]
  end
end