Perhaps you should try some spelling variations:
personal communication » interpersonal communication
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
information und » informations und
3.2 developing » 3.3 developing, 2.2 developing, 3 developing
des personal » des personals, der personal, das personal
costs 3.2 » costs 4.2, cost 3.2, costs 3.5
und des » und der

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information und des personal communication costs 3.2 developing _ access.*.