Perhaps you should try some spelling variations:
"literatura americana e isla." » "literatura mexicana e isla.", "literatura america e isla.", "literatura alemana e isla.", "literatura americana de isla.", "literatura americana en isla.", "literatura americana el isla.", "literatura americana e islas.", "literatura americana e isela."
"literatura breve e islam." » "literatura de e islam.", "literatura en e islam.", "literatura del e islam.", "literatura breve de islam.", "literatura breve en islam.", "literatura breve el islam.", "literatura breve e islas.", "literatura breve del islam.", "literatura breve e islasm.", "literatura breve e iselam."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("literatura americana e isla.") OR ("literatura breve e islam."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura americana e isla.\") OR (\"literatura breve e islam.\"))".
• Removing quotes may allow a broader search: (( literatura americana e isla. ) OR ( literatura breve e islam. )).
• Adding a wildcard symbol may retrieve word variants: (("literatura americana e isla.") OR ("literatura breve e islam."))*.