Perhaps you should try some spelling variations:
model developpement » model development, de developpement, model developments
information data » information d820, information database, information databases
developpement en » developpement et, developpement des, developpement de
4 communication » 3 communication, 5.4 communication, de communication
technology 4.2 » technology 2.2, technology 3.2, technology 4.1
data scarce » data source, data sparse, data sources
costs model » cost model, cost models, costs money
scarce 4 » scarce 3, scare _, source 4

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

• Adding a wildcard symbol may retrieve word variants: technology 4.2 information data scarce 4 communication costs model developpement en afrique.*.