Perhaps you should try some spelling variations:
"serie 1 de may." » "serie 31 de may.", "serie a de may.", "serie e de may.", "serie 1 de maya.", "serie 1 de mal.", "serie 1 de man.", "serie 11 de may.", "serie y de may.", "serie _ de may."
"Serie 1 de malo." » "Serie 1 de malos.", "Serie 1 de mala.", "Serie 1 de mal.", "Serie 11 de malo.", "Serie y de malo.", "Serie _ de malo."
"Serie 1 de mayo." » "Serie 1 de mayao.", "Serie 1 de malo.", "Serie 1 de mano.", "Serie 11 de mayo.", "Serie y de mayo.", "Serie _ de mayo."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("serie 1 de may.") or ((("Serie 1 de mayo.") OR ("Serie 1 de malo."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie 1 de may.") OR ((("Serie 1 de mayo.") OR ("Serie 1 de malo.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"serie 1 de may.\") or (((\"Serie 1 de mayo.\") OR (\"Serie 1 de malo.\"))))".
• Removing quotes may allow a broader search: (( serie 1 de may. ) or ((( Serie 1 de mayo. ) OR ( Serie 1 de malo. )))).
• Adding a wildcard symbol may retrieve word variants: (("serie 1 de may.") or ((("Serie 1 de mayo.") OR ("Serie 1 de malo."))))*.