Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
developpement de » developpement des, developpement durable
technology hard » technology has, technology have, technology hydro
inflation rates » inflation rate
hard inflation » aid inflation, has inflation, hybrid inflation
de afrique » de l'afrique, en afrique, l afrique
space 3.1 » space 2.1, space 3.2, space 3.3

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

• Adding a wildcard symbol may retrieve word variants: technology hard inflation rates space 3.1 communications costs _ developpement de afrique.*.