Perhaps you should try some spelling variations:
3.3 communication » 2.3 communication, 3.2 communication, 3.5 communication
inflation target » inflation targeting, inflation rate, inflation rates
developpement de » developpement des, developpement durable
technology gaps » technology gap
gaps inflation » has inflation, grade inflation, rapid inflation
target space » target spaces, market space, target species
de afrique » de l'afrique, en afrique, l afrique
space 3.3 » space 3.2, space 2.1, space 2.2

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 space 3.3 communication costs _ developpement de afrique.*.