Perhaps you should try some spelling variations:
oral communication » personal communication
des developpement » des developpements, de developpement, le developpement
technologies can » technologies a, technologies co, technologies _
developpement en » developpement et, developpement des, developpement de
can information » von information, von informationen
information 5.2 » information 15.2, information 1.2, information 5.4
do oral » do rural, who oral
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: technologies can information 5.2 do oral communication a des developpement en afrique.*.