Perhaps you should try some spelling variations:
information class » information classes, information case, information costs
1.3 communication » 2.3 communication, 13 communication, 4.3 communication
developing areas » developing asia, developing east, developing a
class debate » grass debatte, class state, care debate
a developing » a development
areas africa » arabs africa, dress africa, farmers africa
debate 1.3 » debate 15.3, debates 1.3, debate 8.3
costs a » 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 class debate 1.3 communication costs a developing areas africa.*.