Perhaps you should try some spelling variations:
information centers » information contents, information officers
debt communication » de communication, et communication, get communication
communication cost » communication costs, communication costa, communications costs
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
12.4 developing » 1.4 developing, 2.2 developing, 1.3 developing
developing ii » developing ai, developing ict, developing cil
centers has » centers case, century has, centers a
cost 12.4 » coast 12.4, costs 12.4, cost 2.4
ii africa » ii afrika, ii america, 1 africa
has debt » has dealt, has left, its debt

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 has debt communication cost 12.4 developing ii africa.*.