Perhaps you should try some spelling variations:
technological chain » technological change, technological choice, technological gains
innovation states » innovation state, innovation spaces, innovation shades
chain innovation » chain integration, open innovation, green innovation
developpement en » developpement et, developpement des, developpement de
2 communication » 3 communication, 4 communication, 1 communication
4 developpement » de developpement, le developpement, et developpement
costs 4 » costs _, costs a, costs 4.2
case 2 » case 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 states case 2 communication costs 4 developpement en afrique.*.