Perhaps you should try some spelling variations:
"literature francesc y isla." » "literatura francesa y isla.", "literature france y isla.", "literatura francesas y isla.", "literature francesca y isla.", "literature frances y isla.", "literature francesc a isla.", "literature francesc e isla."
"literatura de fe isaac." » "literatura de de isaac.", "literatura de e isaac.", "literatura de _ isaac."
"literatura _ de islam." » "literatura _ del islam.", "literatura _ de isla.", "literatura _ e islam."

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: (((("literatura de fe isaac.") or ("literatura _ de islam."))) or ("literature francesc y isla."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de fe isaac.") OR ("literatura _ de islam."))) OR ("literature francesc y isla.")).
• Removing quotes may allow a broader search: (((( literatura de fe isaac. ) or ( literatura _ de islam. ))) or ( literature francesc y isla. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura de fe isaac.") or ("literatura _ de islam."))) or ("literature francesc y isla."))*.