Perhaps you should try some spelling variations:
technologies based » technologies used, technology based, technologies a
safe communication » safety communication, scale communication, space communication
der developpement » de developpement, des developpements, leur developpement
based formation » based information, based deformation, based formative
formation sand » formation bank, formation can, formation und
des afrique » en afrique, de l'afrique
sand a » sand _, sand 1, sandra a
a safe » _ safe
a der » _ der, 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: technologies based formation sand a safe communication a der developpement des afrique.*.