Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developing city » developing cities, developing data, developing high
estimation der » estimation de, estimation des, estimation under
1.5 developing » 1.3 developing, 15 developing, 1.4 developing
der debatte » die debatte
city africa » china africa, cults africa
debatte de » debatte der, debatten der, debatte das
costs 1.5 » costs 3.5, costs 2.5, costs 4.5

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

• Adding a wildcard symbol may retrieve word variants: technology _ estimation der debatte de communication costs 1.5 developing city africa.*.