Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
13.5 communications » 3.5 communication, 3.1 communications, 13.2.2 communications
leon developpement » le developpement, en developpement, leur developpement
developpement de » developpement des, developpement durable
technology der » technology does, technology 4ir, technology dlt
der inflation » core inflation, _ inflation, low inflation
space 13.5 » space 11.5, space 13.4, space 1.5
costs leon » costa leon

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

• Adding a wildcard symbol may retrieve word variants: technology der inflation _ space 13.5 communications costs leon developpement de l'afrique.*.