Perhaps you should try some spelling variations:
technological chain » technological change, technological choice, technological gains
2.3 communication » 3.2 communication, de communication, 4 communication
chain innovation » chain integration, open innovation, green innovation
developpement de » developpement des, developpement durable
innovation race » innovation rate, innovation space, innovation brac
de afrique » de l'afrique, en afrique, l afrique
race date » trade date, grace dave, race race
date 2.3 » daten 2.3, data 2.3, rate 2.3

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

• Adding a wildcard symbol may retrieve word variants: technological chain innovation race date 2.3 communication costs _ developpement de afrique.*.