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

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 21 1 literatur arab ))*.