Perhaps you should try some spelling variations:
communication barriere » communication barriers, communication series, communication based
der developpement » de developpement, des developpements, leur developpement
technologies ret » technologies _, technologies 4, technologies 2
developpement de » developpement des, developpement durable
ret formulation » et formulation, re formulation, from formulation
4 communication » 3 communication, 5.4 communication, de communication
formulation de » formulation des, formulacion de, formulation du
barriere der » barrieren der, barrieren des, barriera di
de afrique » de l'afrique, en afrique, l afrique
de does » der does, do does, one does
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 ret formulation de does 4 communication barriere der developpement de afrique.*.