Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
developpement en » developpement et, developpement des, developpement de
transition rate » transition race, transition trade, transition case
a developpement » au developpement, de developpement, le developpement
technology 2.2 » technology _, technology 1, technology 3
2.2 transition » 12.2 transition, 2.1 transition, 2.3 transition
rate problems » trade problems, waste problems, water problems
problems 3.2 » problem 3.2, problems 3.3, problems 2.2
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology 2.2 transition rate problems 3.2 communication costs a developpement en afrique.*.