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 man.", "serie 1 de mayor.", "serie 11 de may.", "serie y de may."
"serie 1 de mal." » "serie 31 de mal.", "serie a de mal.", "serie e de mal.", "serie 1 de mala.", "serie 11 de mal.", "serie y de mal."
"serie o de may." » "serie a de may.", "serie e de may.", "serie g de may.", "serie o de maya.", "serie o de man.", "serie o de mayor.", "serie y de may."
"serie _ de mayo." » "serie _ de mayao.", "serie _ de mano.", "serie _ de mayoro."

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

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