Perhaps you should try some spelling variations:
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
developpement de » developpement des, developpement durable
inflation rates » inflation rate
risk inflation » risk information, rising inflation, risk inclination
rates case » rates cape, states case, rates east
de afrique » de l'afrique, en afrique, l afrique
case 4.2 » case 4.1, case 2

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

• Adding a wildcard symbol may retrieve word variants: technology risk inflation rates case 4.2 communication costs _ developpement de afrique.*.