Perhaps you should try some spelling variations:
oral communication » personal communication
technologien aids » technologien als, technologien ad, technologien des
information 1.5.2 » information 1.2, information 2
aids information » chandos information, series information
4 developing » 3 developing
developing a » developing _
1.5.2 best » 1.6.2 best, 11.2.2 best, 13.2.2 best
best oral » best deal
costs 4 » costs _, costs a, costs 4.2
a 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: technologien aids information 1.5.2 best oral communication costs 4 developing a areas.*.