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
information case » information based, information can, information costs
developing areas » developing asia, developing east, developing a
a developing » a development
areas africa » arabs africa, dress africa, farmers africa
case new » use new
new oral » new moral, knew moral, new rural
costs a » costs _, costs 4

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologien aids information case new oral communication costs a developing areas africa.~.
• Adding a wildcard symbol may retrieve word variants: technologien aids information case new oral communication costs a developing areas africa.*.