Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
developing rates » developing states, developing water, developing cities
technology 1 » technology _
3 developing » 3 development
rates africa » state africa
law debate » law debates, a debate, war debate
debate 3.1 » debate 2.1, debate 6.1, debate 3.5
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 1 information law debate 3.1 communications costs 3 developing rates africa.*.