Perhaps you should try some spelling variations:
personen communication » personal communication, personal communications, prone communication
technologien des » technologien fur, technologien und, technologies 2
des information » des informations, does information, dis information
developing east » development east, developing a, developing asia
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
information 7 » information 2, information 3, information 1
mehr personen » der personen, fur personen
east areas » karst areas, east asezs
costs 2.2 » costs 4.2, costs 2.3, cost 2.2

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

• Adding a wildcard symbol may retrieve word variants: technologien des information 7 mehr personen communication costs 2.2 developing east areas.*.