Perhaps you should try some spelling variations:
"literatura breve de isaias." » "literatura de de isaias.", "literatura en de isaias.", "literatura breve de indias.", "literatura breve de isaac.", "literatura brevde de isaias.", "literatura brevy de isaias.", "literatura brev_ de isaias."
"literatura del e islas." » "literatura de e islas.", "literatura en e islas.", "literatura del el islam.", "literatura del v islas.", "literatura del _ islas.", "literatura del c islas."
"literatura e de isaias." » "literatura de de isaias.", "literatura en de isaias.", "literatura e de indias.", "literatura e de isaac.", "literatura y de isaias.", "literatura _ de isaias."

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