Perhaps you should try some spelling variations:
technologies energy » technologies general, technology energy, technologies any
oral communication » personal communication
de development » e development, ce development, de developpement
development co » development case, development china
co afrique » en afrique, l afrique
flows do » flows how, flows job, flows _
do oral » do rural, who oral

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies energy information flows do oral communication _ de development co afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies energy information flows do oral communication _ de development co afrique.*.