Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologien aids » technologien als, technologien ad, technologien des
der communication » de communication, under communication, debt communication
aids information » chandos information, series information
15 developing » 1 developing, 5 developing, 10 developing
developing a » developing _
contents a » contents 1, contents _, contents i
a africa » 1 africa, can africa, em africa
cost 15 » cost 12, cost 5, cost 11.5
a der » _ der, 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information contents a der communication cost 15 developing a africa.*.