Perhaps you should try some spelling variations:
der informationssystem » des informationssystems, das informationssystem, als informationssystem
informationssystem 5.4 » informationssysteme 4.4, informationssystem 2.3, informationssystems 3.2
oral communication » personal communication
technologien der » technologien des, technologie der, technologien fur
developing 2 » developing _, developing a, developing e
2 african » _ african, 1 african
non oral » non oil, non arab
5.4 non » 3.4 non, 1.4 non, 4.4 non

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

• Adding a wildcard symbol may retrieve word variants: technologien der informationssystem 5.4 non oral communication costs _ developing 2 african.*.