Perhaps you should try some spelling variations:
literature oral » literature moral, literatura oral, literature morals
1979 wagenen » 1979 wenn
1 literatura » 1 literatur, y literatura, a literatura
agenda ii » agenda iii, agenda i, agenda iv
2 agenda » _ agenda, 7 agenda, 1 agenda

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) OR (1979 wagenen)) i a literature oral ) OR ( 2 agenda ii ((1 literatura) OR (1 literature)) arab ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((1979 agenda) OR (1979 wagenen)) i a literature oral ) or ( 2 agenda ii ((1 literatura) or (1 literature)) arab ))*".