Perhaps you should try some spelling variations:
technologies 3.3 » technologies 3.1, technologies 3.2, technologies 2.3
de communication » mobile communication, online communication
3.3 information » 4.3 information, 2.3 information, 6.3 information
information und » informations und
2.3 development » 2 development, 2015 development, 1 development
costs 2.3 » costs 4.2, costs 4.4
die de » die die, die der, die den

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

• Adding a wildcard symbol may retrieve word variants: technologies 3.3 information und die de communication costs 2.3 development africa east.*.