Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
information centers » information contents, information officers
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
developing de » developing e, developing ce, developing deep
centers 3 » centers _, centers a, centers 3.3
de africa » does africa, de america, use africa

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information centers 3 data communications costs _ developing de africa.*.