Perhaps you should try some spelling variations:
persona communication » personal communication, personal communications, personal communicator
information 12.3.1 » information 1.2.3.1, information 12.2.1, information 2.3.1
technologies 2 » technologies _, technologies 4
eine persona » eine person, ein persona, die persona
developing e » developing _, developing a, developing east
12.3.1 eine » 2.3.1 eine, 3.3.1 eine, 12.3.1 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: technologies 2 information 12.3.1 eine persona communication costs _ developing e areas.*.