Perhaps you should try some spelling variations:
literature oral » literature moral, literatura oral, literature morals
1 literatura » 1 literatur, y literatura, a literatura
1979 agenda » 1979 wagenen
agenda ii » agenda iii, agenda iv, agenda 21
agenda i » agenda a, agenda 6, agenda 2

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( 1979 agenda i a literature oral ) OR ( 2 ((agenda ii) OR (agenda _)) ((1 literatura) OR (1 literature)) arab ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( 1979 agenda i a literature oral ) or ( 2 ((agenda ii) OR (agenda _)) ((1 literatura) or (1 literature)) arab ))*".