Perhaps you should try some spelling variations:
information centers » information contents, information officers
oral communication » personal communication
technologien als » technologien des, technologien fur, technologien und
als information » als informations, aids information, laws information
3.1 development » 2 development
development aid » development a, development africa, development agenda
aid africa » aid african, aid africa's, aids africa's
centers a » centers _, center a, enters a
costs 3.1 » costs 3.5, costs 4.1, costs 2.1
a oral » _ oral, 2 oral, 4 oral

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

• Adding a wildcard symbol may retrieve word variants: technologien als information centers a oral communication costs 3.1 development aid africa.*.