Perhaps you should try some spelling variations:
cost developpement » cost development, et developpement, post development
1.1 communication » 4.1 communication, 1.3 communication, 1.4 communication
developpement en » developpement et, developpement des, developpement de
technology gaps » technology gap
gaps inflation » has inflation, grade inflation, rapid inflation
rate space » state space, trace space, safe space
costs cost » costs cross, costs case, costs cash
space 1.1 » spaces 1.1, space 2.1, space 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology gaps inflation rate space 1.1 communication costs cost developpement en afrique.*.