Perhaps you should try some spelling variations:
person communication » personal communication, personal communications, irsn communication
information 1.5.2 » information 1.2, information 2
technologien des » technologien fur, technologien und, technologies 2
des information » des informations, does information, dis information
4 developing » 3 developing
der person » per person, der personen, older persons
1.5.2 der » 3.5.2 der, 5.5.2 der, 1.5.4 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: technologien des information 1.5.2 der person communication costs 4 developing _ areas.*.