Perhaps you should try some spelling variations:
communications barriere » communication barriers, communications barry, communications series
der developpement » de developpement, des developpements, leur developpement
formulation over » formation over, formulation model, formulation where
a communications » a communication, data communications, a communicative
developpement l » developpement il, developpement la, developpement de
barriere der » barrieren der, barrieren des, barriera di
over does » cover does, der does, over de
l afrique » en afrique
does a » does _

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

• Adding a wildcard symbol may retrieve word variants: technologies _ formulation over does a communications barriere der developpement l afrique.*.