Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
information century » information centers, information centre, information center
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
2 communications » 2 communication, 3 communications, 4 communications
developing ai » developing a, developing av, developing asia
4 developing » 3 developing
century 1 » century _, century a
ai africa » ii africa, can africa, 1 africa
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information century 1 2 communications costs 4 developing ai africa.*.