Perhaps you should try some spelling variations:
communication barrier » communication barriers, communication series, communication based
technologies 2.2 » technologies 2.1, technologies 3.2, technologies 2.4
developpement de » developpement des, developpement durable
2.2 information » 4.2 information, 2.2.3 information, 2.2 transformation
information due » information does, information der, information duties
1 communication » 10 communication, 3 communication, 4 communication
de afrique » de l'afrique, en afrique, l afrique
due does » der does, one does, do does
does 1 » does _, does a, does e

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.2 information due does 1 communication barrier _ developpement de afrique.*.