Perhaps you should try some spelling variations:
duell communications » cell communications, rural communications, cell 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
le developpement » de developpement, sme development
developpement de » developpement des, developpement durable
information 2 » information 3
das duell » das duale
2 das » 1 das

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 2 das duell communications _ le developpement de l'afrique.*.