Perhaps you should try some spelling variations:
communications serien » communications series, communication series, communications services
information 2.3.1 » information 2.3.2, information 5.3.1, information 2.3.3
de communications » de communication, do communications, mce communications
der developpement » de developpement, des developpements, leur developpement
developpement en » developpement et, developpement des, developpement de
2.3.1 does » 2.3.1 des, 14.3.1 does, 2.3.1 die
serien der » serie de, series de, theorien der
does de » does debt

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information 2.3.1 does de communications serien der developpement en afrique.*.