Perhaps you should try some spelling variations:
5.4 communication » de communication, data communication
information case » information based, information can, information costs
developing cross » development cross, developing areas, development across
3 developing » 3 development
cross africa » across africa, across african, crises africa
case debate » care debate, class debate, false debate
debate 5.4 » debate 1.4, debate 2.4, debate 15.3
costs 3 » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology _ information case debate 5.4 communication costs 3 developing cross africa.*.