Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
technologien nd » technologien und, technologien ad, technologie und
developing salt » developing small, developing smart, developing east
nd information » und information, d information, od information
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
salt accessed » all accessed, last accessed
costs 2.2 » costs 4.2, costs 2.3, cost 2.2
4.2 why » 1.2 why, 2.2 why, 8.2 why
why de » why do, why does, why code

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

• Adding a wildcard symbol may retrieve word variants: technologien nd information 4.2 why de communication costs 2.2 developing salt accessed.*.