Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
developpement de » developpement des, developpement durable
technology 5.33 » technology 5.3, technology 5.3.1, technology 2.3
5.33 inflation » 3.3.3 inflation, 5.4.3 inflation, 2.3 inflation
rate space » state space, trace space, safe space
de afrique » de l'afrique, en afrique, l afrique
space 3.2 » space 2.1

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

• Adding a wildcard symbol may retrieve word variants: technology 5.33 inflation rate space 3.2 communication costs _ developpement de afrique.*.