Perhaps you should try some spelling variations:
5.3 communication » 2.3 communication, 4.3 communication, 1.3 communication
inflation target » inflation targeting, inflation rate, inflation rates
developpement en » developpement et, developpement des, developpement de
technology gaps » technology gap
4 developpement » de developpement, le developpement, et developpement
gaps inflation » has inflation, grade inflation, rapid inflation
target spaces » target species, target states, target prices
spaces 5.3 » spaces 15.3, spaces 2.3, space 5.3
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 gaps inflation target spaces 5.3 communication costs 4 developpement en afrique.*.