Perhaps you should try some spelling variations:
personen communication » personal communication, personal communications, prone communication
information case » information based, information can, information costs
developing east » development east, developing a, developing asia
technologies a » technologies _, technologies 4, technologies 2
a information » 2 information, 1 information
der personen » der personalen, per person, und personen
4 developing » 3 developing
east areas » karst areas, east asezs
case der » case des, case under, phase der
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies a information case der personen communication costs 4 developing east areas.*.