Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
information gaps » information gap
developpement en » developpement et, developpement des, developpement de
3 information » 1 information
technology 3 » technology _, technology 1, technology 4
gaps rice » laos rice
rice 3.1 » rice 2.1, rice 3.3, rice 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology 3 information gaps rice 3.1 communications costs _ developpement en afrique.*.