Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
technologies 2.1 » technologies _, technologies 4, technologies a
information oder » information der, information model, information code
2.1 information » 3.1 information
4 communication » 3 communication, 5.4 communication, de communication
developpement l » developpement il, developpement la, developpement de
oder does » der does, oder des, cover does
l afrique » en afrique
does 4 » 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 2.1 information oder does 4 communication barriers _ developpement l afrique.*.