Perhaps you should try some spelling variations:
"literatura gallega e islam." » "literatura griega e islam.", "literatura chilena e islam.", "literatura brasilena e islam.", "literatura gallega de islam.", "literatura gallega en islam.", "literatura gallega a islam.", "literatura gallega el islam.", "literatura gallega e islas."
"literatura o del islam." » "literatura e del islam.", "literatura a del islam.", "literatura _ del islam.", "literatura o el islam.", "literatura o de islam."
"literatura y del islam." » "literatura y el islam."

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

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