I'm trying to look for several terms I'm sure they exists... and no results are returned.
My installation it's not traditional thought:
No posts or pages.
One Custom Post Type (say Movies)
Two Custom Taxonomies for Movies (say Directors and Actors)
Several Custom Fields on every Movie.
I've a movie called Star Trek: First Contact, directed by Jonathan Frakes... and a custom field called title_sp which value is Primer Contacto
If I search for Contacto, it works, if I search for Primer, it works as so for Jonathan ... or Frakes.
However, if I search for Primer Contacto or Jonathan Frakes it returns nothing.
I hope it makes sense :(