Perhaps you should try some spelling variations:
literature oral » literature moral, literatura oral, literature morals
y literature » y literatura, key literature, gay literature
y literatur » y literatura
159 agenda » 1979 agenda, 1 agenda, 10 agenda
benda ii » bamenda ii, agenda ii, eda ii
2 benda » 2 bends
ii a » i 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 ((ii a) OR (ii _)) literature oral ) OR ( 2 benda ii ((y literature) OR (y literatur)) author )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( 159 agenda ((ii a) OR (ii _)) literature oral ) or ( 2 benda ii ((y literature) or (y literatur)) author ))".
• Adding a wildcard symbol may retrieve word variants: (( 159 agenda ((ii a) OR (ii _)) literature oral ) or ( 2 benda ii ((y literature) or (y literatur)) author ))*.