Perhaps you should try some spelling variations:
3.3 communication » 2.3 communication, 3.2 communication, 3.5 communication
information cost » information costs, information lost, information case
development can » development case, development co, development canada
cost debates » los debates, old debates
debates 3.3 » debates 13.3, debates 1.3, debates 3.5.3
can africa » urban africa
costs 2 » costs 20, costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology _ information cost debates 3.3 communication costs 2 development can africa.*.