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
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
developing e » developing _, developing a, developing east
centers has » centers case, century has, centers a
has debt » has dealt, has left, its debt
cost 2.3 » costs 2.3, cost 2.4, cost 2.2
e africa » em africa, de africa, eu 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 has debt communication cost 2.3 developing e africa.*.