Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
transfer extraction » transfer operation, parameter extraction
4.2 communications » 4.2 communication, 3.2 communication, 6.2 communication
le developpement » de developpement, sme development
developpement l » developpement il, developpement la, developpement de
france 4.2 » france 2.2, france 4.1, france 6.1
l afrique » en afrique
costs le » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology transfer extraction _ france 4.2 communications costs le developpement l afrique.*.