Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
study regulation » study population, study regulators, history regulation
developpement en » developpement et, developpement des, developpement de
regulation role » regulations roles, regulation rules, regulatory role
4 developpement » de developpement, le developpement, et developpement
role franco » pole france, couple franco
franco 6.2 » france 6.25, france 6.2.1, france 6.2.3
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology study regulation role franco 6.2 communication costs 4 developpement en afrique.*.