Perhaps you should try some spelling variations:
personal communication » interpersonal communication
technologies 1 » technologies _, technologies 4, technologies 2
information 3 » information 2
des personal » des personals, der personal, das personal
4 developing » 3 developing
developing 1 » developing _, developing a, developing e
costs 4 » costs _, costs a, costs 4.2
1 areas » 1 area, 2 areas, 4 areas
3 des » 3 der, 3 das, a des

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 information 3 des personal communication costs 4 developing 1 areas.*.