Perhaps you should try some spelling variations:
personen communication » personal communication, personal communications, prone communication
information costs » information contents, information centers, information content
technologies 2 » technologies _, technologies 4
developing ai » developing a, developing av, developing asia
und personen » und personelle, der personen
4 developing » 3 developing
costs und » costs used, costs united, costs edmund
ai africa » ii africa, can africa, 1 africa
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 2 information costs und personen communication costs 4 developing ai africa.*.