Perhaps you should try some spelling variations:
oral communication » personal communication
technologies cost » technologies co, technologies case, technologies cohort
information 1.5.2 » information 1.2, information 2
set developpement » et developpement, de developpement, le developpement
cost information » postal information, about information, asset information
developpement de » developpement des, developpement durable
de afrique » de l'afrique, en afrique, l afrique
1.5.2 do » 1.5.2 die, 1.5.2 _, 1.5.2 a
do oral » do rural, who oral
a set » _ set

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

• Adding a wildcard symbol may retrieve word variants: technologies cost information 1.5.2 do oral communication a set developpement de afrique.*.