Perhaps you should try some spelling variations:
oral communication » personal communication
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
development can » development case, development co, development canada
information im » information 2, information 1, information 1.2
can africa » urban africa
non oral » non oil, non arab

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information im non oral communication costs _ development can africa.*.