Perhaps you should try some spelling variations:
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
developpement de » developpement des, developpement durable
inflation rates » inflation rate
technology low » technology flow, technology law, technology led
low inflation » core inflation, _ inflation
de afrique » de l'afrique, en afrique, l afrique
raise 4.1 » case 4.1, krise 4.1, noise 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology low inflation rates raise 4.1 communication costs _ developpement de afrique.*.