Perhaps you should try some spelling variations:
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
developpement en » developpement et, developpement des, developpement de
technology flow » technology low, technology from, technology food
a developpement » au developpement, de developpement, le developpement
flow inflation » low inflation, food inflation, log inflation
rate rate » rates rates, rate ratio, rate water
rate 4.1 » rates 4.1, rate 4.3, rate 4.2
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 flow inflation rate rate 4.1 communication costs a developpement en afrique.*.