Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
development work » development network, development workshop, development framework
technologien 3 » technologies 3, technologien _, technologie 3
informal 8.4 » informal 4.2, informal q4, informal 3.4.5
work africa » works africa, world african, stock africa
3 informal » _ informal, vs informal
8.4 done » 8.4 phone, 8.4 die, 8.4 code
done de » dune de, donne del, done get

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

• Adding a wildcard symbol may retrieve word variants: technologien 3 informal 8.4 done de communication media _ development work africa.*.