Perhaps you should try some spelling variations:
technological open » technological model, technological power, technological options
3.2 communication » 3 communication, 2.3 communication, de communication
innovation state » innovation space, innovation rate, innovation strategy
developpement en » developpement et, developpement des, developpement de
4 developpement » de developpement, le developpement, et developpement
state case » states case, states cases, state based
case 3.2 » case 4.2, case 3.1, case 5.2
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technological open innovation state case 3.2 communication costs 4 developpement en afrique.*.