Perhaps you should try some spelling variations:
communication costa » communication costs, communications costs, communication cote
technologies 2.1 » technologies _, technologies 4, technologies a
de communication » mobile communication, online communication
2.1 information » 3.1 information
4 developing » 3 developing
developing a » developing _
a africa » 1 africa, can africa, em africa
costa 4 » cost 4, costa e, costa 3

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information contents _ de communication costa 4 developing a africa.*.