Perhaps you should try some spelling variations:
2.3.5 communications » 2.3 communication, 3.5 communication, 2.5 communication
communications costs » communication costs, communications _
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
technology 2.2 » technology _, technology 1, technology 3
2.2 inflation » 2.3 inflation, 3.2 inflation, 2.2.4 inflation
prices 2.3.5 » prices 2.3.1, prices 2.3.4, prices 2.3.6
de afrique » de l'afrique, en afrique, l afrique
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 2.2 inflation _ prices 2.3.5 communications costs a developpement de afrique.*.