Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
2.3 communications » 2.3 communication, 4.3 communication, 1.3 communication
developpement de » developpement des, developpement durable
do information » 2 information, 1 information, 3 information
technology do » technology does, technology dlt, technology 1
prices 2.3 » price 2.3, prices 2.4, prices 2.1
de afrique » de l'afrique, en afrique, l afrique

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

• Adding a wildcard symbol may retrieve word variants: technology do information gap prices 2.3 communications costs _ developpement de afrique.*.