Perhaps you should try some spelling variations:
information centers » information contents, information officers
communication cost » communication costs, communication costa, communications costs
de communication » mobile communication, online communication
developing asia » development asia, developing a
technologies 2 » technologies _, technologies 4
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
asia africa » cpia africa, china africa
centers i » centers _, centers 3, centers a
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
i de » i die, i der, i den

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information centers i de communication cost 2.2 developing asia africa.*.