Perhaps you should try some spelling variations:
technological chain » technological change, technological choice, technological gains
chain innovation » chain integration, open innovation, green innovation
innovation rates » innovation rate, innovation notes, innovation race
de communication » mobile communication, online communication
developpement du » developpement de, developpement des, developpement et
a developpement » au developpement, de developpement, le developpement
rates data » rate data, states data, cases data
du afrique » en afrique, l afrique, de l'afrique
data de » data den, data die, data do
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technological chain innovation rates data de communication costs a developpement du afrique.*.