Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
formulation where » formulation over, formulation des, calculation where
der developpement » de developpement, des developpements, leur developpement
technologies ret » technologies _, technologies 4, technologies 2
ret formulation » et formulation, re formulation, from formulation
e communication » de communication, 1 communication, une communication
developpement l » developpement il, developpement la, developpement de
barriers der » barriere der, barrieren der, barriers d
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: technologies ret formulation where _ e communication barriers der developpement l afrique.*.