Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
development manuel » developpement manuel, development model, development master
hydro development » hydropower development
innovation neveu » innovation never, innovations never, innovation new
2 communications » 2 communication, 3 communications, 4 communications
technologies 2 » technologies _, technologies 4
neveu de » niveau de
de 2 » dem 2, des 2, der 2

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 innovation neveu de 2 communications costs hydro development manuel afrique.*.