Perhaps you should try some spelling variations:
"proteccion especial de." » "proteccion social de.", "coleccion especial de.", "proteccion penal de.", "proteccion especiales de."
"coleccion escorial a." » "coleccion espiral a.", "coleccion especial a.", "coleccion historias a.", "coleccion escorial y.", "coleccion escorial ms.", "coleccion escorial en."
"ablacion hospital de." » "ablacion genital de."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("coleccion escorial a.") or ("ablacion hospital de."))) or ("proteccion especial de."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("coleccion escorial a.") OR ("ablacion hospital de."))) OR ("proteccion especial de."))*.
• Removing quotes may allow a broader search: (((( coleccion escorial a. ) or ( ablacion hospital de. ))) or ( proteccion especial de. ))*.