Perhaps you should try some spelling variations:
communication costa » communication costs, communications costs, communication cote
information centers » information contents, information officers
debt communication » de communication, et communication, get communication
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
developing de » developing e, developing ce, developing deep
centers has » centers case, century has, centers a
costa 2.3 » costs 2.3, cost 2.3, costs 12.3
de africa » does africa, de america, use 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 costa 2.3 developing de africa.*.