Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
4 communication » 3 communication, 5.4 communication, de communication
technologies 2 » technologies _, technologies 4
1.2 developing » 12.2 developing, 13.2 developing, 2.2 developing
developing can » developing a, developing ai, developing av
contents head » contents lead, contents map, contents a
can africa » urban africa
cost 1.2 » cost 3.2, cost 12, cost 2.2
head 4 » ahead 4, head _, dead 4

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 head 4 communication cost 1.2 developing can africa.*.