Perhaps you should try some spelling variations:
oral communication » personal communication
technologien plot » technologien als, technologien ist, technologien mit
plot information » plant information, iot information, about information
information case » information based, information can, information costs
developing areas » developing asia, developing east, developing a
4 developing » 3 developing
areas africa » arabs africa, dress africa, farmers africa
case new » use new
new oral » new moral, knew moral, new rural
costs 4 » costs _, costs a, costs 4.2

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologien plot information case new oral communication costs 4 developing areas africa.~.
• Adding a wildcard symbol may retrieve word variants: technologien plot information case new oral communication costs 4 developing areas africa.*.