Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
de communication » mobile communication, online communication
technologies 2 » technologies _, technologies 4
3.3 developing » 4 developing, 2 developing, 1 developing
developing eu » developing e, developing eq, developing egg
contents how » content how, contents co, contents mot
eu africa » em africa, 1 africa, 11 africa
cost 3.3 » cost 3.2, cost 2.3, cost 3.4
how de » how doe, how do, how ae

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information contents how de communication cost 3.3 developing eu africa.*.