Perhaps you should try some spelling variations:
persona communication » personal communication, personal communications, personal communicator
information 15.2 » information 1.5.2, information 1.2, information 1.3
technologien 2 » technologies 2, technologien _, technologien 1
developing e » developing _, developing a, developing east
die persona » die person, de persona, die personale
15.2 die » 1.5.2 die, 5.2 die, 3.5.2 die
e areas » 1 areas, 2 areas, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologien 2 information 15.2 die persona communication costs _ developing e areas.*.