Perhaps you should try some spelling variations:
technologien bedarf » technologien auf
bedarf information » secondary information
oral communication » personal communication
information 2.2 » information 1.2, information 2.7, information 2.2.2
developing east » development east, developing a, developing asia
4 developing » 3 developing
east areas » karst areas, east asezs
2.2 heat » 2.2 health
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologien bedarf information 2.2 heat oral communication costs 4 developing east areas.*.