Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
information centre » information centers, information contents
technologies 3.1 » technologies 2.1, technologies 3.2, technologies _
de communication » mobile communication, online communication
2.4 developing » 12.4 developing, 2.2 developing, 5.4 developing
developing a » developing _
centre 3.2 » centre 4.2, centru 3.2, century 3.2
a africa » 1 africa, can africa, em africa
3.2 de » 3.2 die, 3.2 der, 3.2 dem

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

• Adding a wildcard symbol may retrieve word variants: technologies 3.1 information centre 3.2 de communication cost 2.4 developing a africa.*.