Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
2.2 information » 4.2 information, 2.2.3 information, 2.2 transformation
technology 2.2 » technology _, technology 1, technology 3
information un » information und, information unit, information use
developing em » developing e, developing eq, developing amp
4 developing » 3 developing
un debate » un debat, u.s debate, _ debate
debate de » debates de, debate we, debatte der
em africa » 1 africa
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 2.2 information un debate de communication costs 4 developing em africa.*.