Perhaps you should try some spelling variations:
"serie 31 de malo." » "serie la de malo.", "serie el de malo.", "serie a de malo.", "serie 31 de malos.", "serie 31 de mala.", "serie 31 de mal.", "serie 11 de malo.", "serie 1 de malo.", "serie 30 de malo."
"serie 31 de may." » "serie la de may.", "serie el de may.", "serie a de may.", "serie 31 de mayo.", "serie 31 de maya.", "serie 31 de mal.", "serie 11 de may.", "serie 1 de may.", "serie 30 de may."
"serie de de may." » "serie de de mayo.", "serie de de maya.", "serie de de mal.", "serie de fe may.", "serie de di may."

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: (("serie 31 de malo.") or ((("serie 31 de may.") OR ("serie de de may."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie 31 de malo.") OR ((("serie 31 de may.") OR ("serie de de may.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"serie 31 de malo.\") or (((\"serie 31 de may.\") OR (\"serie de de may.\"))))".
• Removing quotes may allow a broader search: (( serie 31 de malo. ) or ((( serie 31 de may. ) OR ( serie de de may. )))).
• Adding a wildcard symbol may retrieve word variants: (("serie 31 de malo.") or ((("serie 31 de may.") OR ("serie de de may."))))*.