Perhaps you should try some spelling variations:
technologien series » technologies series, technology series, technologies varies
series information » business information
communication cost » communication costs, communication costa, communications costs
de communication » mobile communication, online communication
3.2 developing » 3.3 developing, 2.2 developing, 3 developing
developing a » developing _
cost 3.2 » cost 2.4
4.2 der » 2.2 der, 3.2 der
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 series information 4.2 der de communication cost 3.2 developing a areas.*.