Perhaps you should try some spelling variations:
"memoria en 10 anos." » "memoria del 10 anos.", "memoria de 10 anos.", "memoria den 10 anos.", "memoria deln 10 anos.", "memoria en 12 anos.", "memoria en 100 anos.", "memoria en 90 anos.", "memoria en 15 anos."
"memoria a 40 anos." » "memoria la 40 anos.", "memoria al 40 anos.", "memoria _ 40 anos.", "memoria a 10 anos."
"memoria e 10 anos." » "memoria de 10 anos.", "memoria del 10 anos.", "memoria e 12 anos.", "memoria a 10 anos.", "memoria 9 10 anos."

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: (("memoria a 40 anos.") or ((("memoria en 10 anos.") or ("memoria e 10 anos."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("memoria a 40 anos.") OR ((("memoria en 10 anos.") OR ("memoria e 10 anos.")))).
• Removing quotes may allow a broader search: (( memoria a 40 anos. ) or ((( memoria en 10 anos. ) or ( memoria e 10 anos. )))).
• Adding a wildcard symbol may retrieve word variants: (("memoria a 40 anos.") or ((("memoria en 10 anos.") or ("memoria e 10 anos."))))*.