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
developpement en » developpement et, developpement des, developpement de
ret formulation » et formulation, re formulation, from formulation
i communication » ii communication, ai communication, 3 communication
barriers der » barriere der, barrieren der, barriers d

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 _ i communication barriers der developpement en afrique.*.