Perhaps you should try some spelling variations:
oral communication » personal communication
technologies case » technologies based, technologies can, technologies create
das developpement » des developpements, de developpement, du developpement
case information » care information, based information, phase information
developpement l » developpement il, developpement la, developpement de
l afrique » en afrique
do oral » do rural, who oral
3.2 do » 3.12 do, 5.2 do, 2.2 do

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

• Adding a wildcard symbol may retrieve word variants: technologies case information 3.2 do oral communication _ das developpement l afrique.*.