Perhaps you should try some spelling variations:
literatura alemana » literatura espana, literatura castellana, literatura colombiana
literatura a » literatura al, literatura e, literatura de
al islam » el islam, del islam
un islam » el islam, _ islam
e islam » el islam, e islas, del islam
y islam » _ islam, el islam, de 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 a ((e islam) or (al islam)). ) or ( literatura alemana ((y islam) OR (un islam)). ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( literatura a ((e islam) OR (al islam)). ) OR ( literatura alemana ((y islam) OR (un islam)). )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( literatura a ((e islam) or (al islam)). ) or ( literatura alemana ((y islam) OR (un islam)). ))".
• Adding a wildcard symbol may retrieve word variants: (( literatura a ((e islam) or (al islam)). ) or ( literatura alemana ((y islam) OR (un islam)). ))*.