Perhaps you should try some spelling variations:
integration across » innovation across, integration als, integration approach
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
technology trade » technology trends, technology transfer, technology transfers
across debates » across states, across devices, across databases
4 developing » 3 developing
debates 2.7 » debates 12.3, debate 2.1, debate 12.7
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology trade integration across debates 2.7 communication costs 4 developing _ africa.*.