Perhaps you should try some spelling variations:
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
technology low » technology flow, technology law, technology led
low inflation » core inflation, _ inflation
rate space » state space, trace space, safe space
de afrique » de l'afrique, en afrique, l afrique
space 2.7 » space 2.1, space 2.2, space 2.3
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology low inflation rate space 2.7 communication costs a developpement de afrique.*.