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 210 » agenda 2010, agenda 10, agenda 20
agenda 21 » agenda _
1 agenda » _ agenda, 7 agenda, 3 agenda
210 1 » 210 10, 210 12, 210 _
21 a » 2 a, 21 _, 20 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 21 a literature oral ) OR ( 1 agenda 210 1 literatur arab ))*.