Perhaps you should try some spelling variations:
"libre{acute}dias." » "libre{acute}diaz.", "libre{acute}dios."
"libro{acute}vias." » "libros{acute}vias.", "libro{acute}via.", "libro{acute}vial."
"libror{acute}rios." » "librosr{acute}rios.", "libros{acute}rios.", "librar{acute}rios.", "librorum{acute}rios.", "libror{acute}rio."
"librer{acute}dos." » "librero{acute}dos.", "llibrer{acute}dos.", "libres{acute}dos."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("libre{acute}dias." or "libro{acute}vias.") or ("librer{acute}dos." or "libror{acute}rios."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("libre{acute}dias." OR "libro{acute}vias.") OR ("librer{acute}dos." OR "libror{acute}rios.")).
• Removing quotes may allow a broader search: (( libre{acute}dias. or libro{acute}vias. ) or ( librer{acute}dos. or libror{acute}rios. )).
• Adding a wildcard symbol may retrieve word variants: (("libre{acute}dias." or "libro{acute}vias.") or ("librer{acute}dos." or "libror{acute}rios."))*.