Perhaps you should try some spelling variations:
wireless communication » wireless communications, business communication
preparations before » preparation reform, preparation more, relations before
technologien des » technologien fur, technologien und, technologies 2
des preparations » les preparations, de preparation, _ preparations
6.4 developing » 5.4 developing, 3.3 developing, 2.2 developing
developing a » developing _
costs 6.4 » costs 4.4, costs 4.2, costs 2.3
a area » a areas, 1 area, 3 area

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

• Adding a wildcard symbol may retrieve word variants: technologien des preparations before _ wireless communication costs 6.4 developing a area.*.