Perhaps you should try some spelling variations:
technological system » technological systems, technological waste, technical system
facher communication » teacher communication, face communication, teachers communication
communication using » communications using, communication during, communicating using
system formation » system transformation, systeme d'information, system function
all developing » small developing, all development, 3 developing
developing a » developing _
der facher » der flachen, der flache, der bucher
using all » using als, using small, using a
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: technological system formation _ der facher communication using all developing a areas.*.