Perhaps you should try some spelling variations:
technology change » technological change, technological changes
change innovation » change information, chain innovation, trade innovation
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
innovation rates » innovation rate, innovation notes, innovation race
developpement en » developpement et, developpement des, developpement de
rates case » rates cape, states case, rates east
case 2.7 » case 2.3, case 2.1, case 2.2

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

• Adding a wildcard symbol may retrieve word variants: technology change innovation rates case 2.7 communication costs _ developpement en afrique.*.