Perhaps you should try some spelling variations:
information centers » information contents, information officers
oral communication » personal communication
technologien does » technologien des, technologien als, technologie de
does information » des informations, dis information, users information
developing east » development east, developing a, developing asia
centers 4.2 » centers 2.2, centers 4.3, centers 4.2.7
east areas » karst areas, east asezs
4.2 oral » 4.5 oral, 4.1.2 oral, 14.4 oral

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

• Adding a wildcard symbol may retrieve word variants: technologien does information centers 4.2 oral communication costs _ developing east areas.*.