Perhaps you should try some spelling variations:
oral communication » personal communication
information cases » information case, information classes, information costs
2.5 development » 2.3 development, 2.1 development, 2.2 development
development 3.1 » development 1
technologies 2 » technologies _, technologies 4
3.1 access » 1.1 access, 3.2 access, 3.6 access
cases der » cases des, cases per, cases over
costs 2.5 » costs 2.3, costs 3.5, cost 2.5
der oral » der moral, der ort, der orte

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information cases der oral communication costs 2.5 development 3.1 access.*.