Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
developing estate » developing state, developing states, developing stable
information laws » information law
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
estate africa » state africa, states african, status africa
technology 1 » technology _
laws debate » law debate, class debate, law debates
debate 2.1 » debate 6.1, debate 1, debate 4.2
costs 2.3 » costs 4.2, costs 4.4

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

• Adding a wildcard symbol may retrieve word variants: technology 1 information laws debate 2.1 communication costs 2.3 developing estate africa.*.