Perhaps you should try some spelling variations:
actors communication » actions communication, active communication, networks communication
communication modes » communication model, communication des, communication media
development can » development case, development co, development canada
technologies 2 » technologies _, technologies 4
4.1 actors » 4.4 actors, 2.2 actors, 6.4 actors
can africa » urban africa
modes gas » model gaps
gap 4.1 » gap 14.1, map 4.1, gap 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information gap 4.1 actors communication modes gas development can africa.*.