Perhaps you should try some spelling variations:
1.6 communication » 11.6 communication, 1.1 communication, 1.3 communication
developing areas » developing asia, developing east, developing a
information u.s » information und, information use, information 1.2
technologie 10 » technologies 10, technologies 11, technologies 12
10 information » 1 information, 2 information, 3 information
4 developing » 3 developing
areas africa » arabs africa, dress africa, farmers africa
u.s debate » u.s senate, 2.1 debate, 3.4 debate
debate 1.6 » debate 10.6, debate 12.6, debate 1.4
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: technologie 10 information u.s debate 1.6 communication costs 4 developing areas africa.*.