Perhaps you should try some spelling variations:
communication costo » communication costs, communication costa, communications costs
7.2 communication » 3.2 communication, 6.2 communication, 2.2 communication
del developpement » de developpement, des developpements, le developpement
information use » information und, information 2
4 information » 2 information, 1 information
technology 4 » technology _, technology 1, technology 3
des afrique » en afrique, de l'afrique
costo del » costa del, cose del, costo e
use rice » used rice, user price, e rice
rice 7.2 » rice 3.2, rice 7.1, rice 8.2

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

• Adding a wildcard symbol may retrieve word variants: technology 4 information use rice 7.2 communication costo del developpement des afrique.*.