Perhaps you should try some spelling variations:
communication barriere » communication barriers, communication series, communication based
leur developpement » le developpement, deux developpements, de developpement
developpement de » developpement des, developpement durable
formation under » formation des, formation over, estimation under
technologies 1 » technologies _, technologies 4, technologies 2
barriere leur » barriere der, barriers learn, barrieren der
1 formation » 1.2 formation, de formation, en formation
de fabrique » la fabrique, de l'afrique

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 formation under deep _ communication barriere leur developpement de fabrique.*.