Perhaps you should try some spelling variations:
technologies energy » technologies general, technology energy, technologies any
4 developpement » de developpement, le developpement, et developpement
developpement a » developpement la, developpement de, developpement et
a afrique » l afrique, en afrique
a mobile » _ mobile
costs 4 » costs _, costs a, costs 4.2

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 _ a mobile communication costs 4 developpement a afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies energy information _ a mobile communication costs 4 developpement a afrique.*.