Ok i understand.
I created a main Category called Disciplina (main Category) the Subdisciplinas ( subcategorys) have several entrys ( like Robotica or Arcquitectura ...)
When someone search is the first step at for example Computacion ( Computer science) the Depend Filter shows me now the Entrys in that main category. I need that the User can search through 2 filters ( subcategorys)
I hope its more clear now.