Perhaps you should try some spelling variations:
information centers » information contents, information officers
communication cost » communication costs, communication costa, communications costs
technologien aids » technologien als, technologien ad, technologien des
get communication » et communication, debt communication, de communication
aids information » chandos information, series information
15 developing » 1 developing, 5 developing, 10 developing
developing em » developing e, developing eq, developing amp
centers 3 » centers _, centers a, centers 3.3
em africa » 1 africa
cost 15 » cost 12, cost 5, cost 11.5
3 get » _ get, i get, 4 get

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 get communication cost 15 developing em africa.*.