Perhaps you should try some spelling variations:
der communication » de communication, under communication, debt communication
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
90 developing » 10 developing, 20 developing, 3 developing
model stadte » model state, models state, model stargey
stadte der » stadten der, stadt der, stadte des
costs 90 » costs 20, costs 60, costs 1900

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information model stadte der communication costs 90 developing _ trends.*.