Perhaps you should try some spelling variations:
communication system » communication systems, telecommunication system, communication series
actors communication » actions communication, active communication, networks communication
information amp » information age, information a, information act
3.1 development » 2 development
technologies a » technologies _, technologies 4, technologies 2
a information » 2 information, 1 information
der actors » key actors, new actors, aet actors
system 3.1 » system 3.2, system 1
amp der » amp de, amp dior

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technologies a information amp der actors communication system 3.1 development 1 africa.*.