Perhaps you should try some spelling variations:
technological system » technological systems, technological waste, technical system
communication using » communications using, communication during, communicating using
face communication » voice communication, de communication, time communication
system formation » system transformation, systeme d'information, system function
3 developing » 3 development
developing 4 » developing _, developing a, developing e
der face » der farce, der fake, der facher
using 3 » using 3d, using 3h, using _
4 areas » 1 areas, 2 areas, 4 areal

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

• Adding a wildcard symbol may retrieve word variants: technological system formation _ der face communication using 3 developing 4 areas.*.