Perhaps you should try some spelling variations:
oral communication » personal communication
information costs » information contents, information centers, information content
technologien ad » technologien am, technologien und, technologien als
ad information » d information, nd information, od information
developing amp » developing a, developing ai, developing av
amp africa » em africa, wup africa
net oral » net oil, mit oral

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

• Adding a wildcard symbol may retrieve word variants: technologien ad information costs net oral communication costs _ developing amp africa.*.