Perhaps you should try some spelling variations:
technological chain » technological change, technological choice, technological gains
3.2 communication » 3 communication, 2.3 communication, de communication
chain innovation » chain integration, open innovation, green innovation
innovation rate » innovation race, innovation create, innovation state
developpement l » developpement il, developpement la, developpement de
l afrique » en afrique
data 3.2 » data 3.1

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

• Adding a wildcard symbol may retrieve word variants: technological chain innovation rate data 3.2 communication costs _ developpement l afrique.*.