Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
des developpement » des developpements, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
based formative » based information
formative der » formative peer, formate der, formative years
barriers des » barrieren des, barriere der, barriers d

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

• Adding a wildcard symbol may retrieve word variants: technology based formative der does _ communication barriers des developpement en afrique.*.