Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
clean developpement » clean development, clean developoment, le developpement
developpement en » developpement et, developpement des, developpement de
information one » information alone, information oder, information open
4 communication » 3 communication, 5.4 communication, de communication
technologies 4 » technologies _
barriers clean » barriers learn, barriers law, barriers been
4 information » 2 information, 1 information
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 4 information one does 4 communication barriers clean developpement en afrique.*.