Perhaps you should try some spelling variations:
oral communication » personal communication
2.2.3 information » 2.2 information, 4.3 information
technology 2.2.3 » technology 1.2.3, technology 2.1.3, technology 2.2.2
information auge » information age, information after, information alone
developpement en » developpement et, developpement des, developpement de
auge der » auge oder, augen der, zuge der
der oral » der moral, der ort, der orte

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

• Adding a wildcard symbol may retrieve word variants: technology 2.2.3 information auge der oral communication costs _ developpement en afrique.*.