Perhaps you should try some spelling variations:
information century » information centers, information centre, information center
3 communication » 4 communication, de communication, data communication
developing crop » developing cross, developing bop, developing micro
technologies 4 » technologies _
7.3 developing » 3.3 developing, 1.3 developing, 2.2 developing
4 information » 2 information, 1 information
century case » century a
crop africa » crow african, across africa, europe africa
costs 7.3 » costs 2.3, costs 4.3, costs 5.3
case 3 » case 1, case 2

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information century case 3 communication costs 7.3 developing crop africa.*.