Perhaps you should try some spelling variations:
literature oral » literature moral, literatura oral, literature morals
literatur ab » literatur a, literatur a1, literatur am
1 literatur » 11 literatur, 1 literature
159 agenda » 1979 agenda, 10 agenda, 12 agenda
agenda 6 » agenda _, agenda a, agenda 21
1 agenda » _ agenda, 7 agenda, 3 agenda
agenda 2 » agenda 21, agenda _, agenda a

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: (( 159 agenda 6 a literature oral ) OR ( 1 agenda 2 1 literatur ab ))*.