Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
information center » information centers, information centre, information content
technologien aids » technologien als, technologien ad, technologien des
10 communications » 10 communication, 14 communications, 2 communications
aids information » chandos information, series information
developing av » developing a, developing ai, developing amp
4 developing » 3 developing
center 2.1 » century 2.1, center 1
av africa » v africa, iv africa, can africa
costs 4 » costs _, costs a, costs 4.2
2.1 10 » 1.1 10, 2.1 11, 2.1 1g

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information center 2.1 10 communications costs 4 developing av africa.*.