Perhaps you should try some spelling variations:
communications cost » communications costs, communications cross, communication costs
developing cross » development cross, developing areas, development across
technologies 4 » technologies _
4 information » 2 information, 1 information
cross african » across african, across africa, class african
contents 3.1 » contents 1, contents _, contents map
3 developing » 3 development
3.1 data » 2.1 data
cost 3 » cost 3d, cost e3, cost _

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information contents 3.1 data communications cost 3 developing cross african.*.