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
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
developing av » developing a, developing ai, developing amp
contents 13 » contents 1, contents 19, contents 1.1
av africa » v africa, iv africa, can africa
cost 2.3 » costs 2.3, cost 2.4, cost 2.2
13 de » 13 die, 13 der, 13 des

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 13 de communication cost 2.3 developing av africa.*.