Polymorphic Search

I have a basic model structure like this:

class History < ActiveRecord::Base
  belongs_to :historical, polymorphic: true, touch: true
end

with several related models:

has_many :history, :as => :historical, :dependent => :destroy

It seem to me that there is no easy way to search the History model AND the related models. For example each related model has a name and notes field. Can I do some sort of crazy multiple join and use conditions on the join?