Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
can developpement » au developpement, en developpement, can development
developpement en » developpement et, developpement des, developpement de
4 communication » 3 communication, 5.4 communication, de communication
technologies 4 » technologies _
4 formulation » _ formulation, 3 formulation, 2 formulation
barriers can » barriers than, barriers a, barriers law
rahmen 4 » rahmen 1, rahmen 2, rahmen a

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 formulation _ rahmen 4 communication barriers can developpement en afrique.*.