Perhaps you should try some spelling variations:
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
developpement et » developpement des, developpement de, development east
technology log » technology lag, technology low, technology law
log inflation » low inflation, local inflation, lower inflation
inflation tax » inflation rate, inflation _, inflation target
et afrique » en afrique, l afrique
space 4.1 » space 2.1, space 4.3, space 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology log inflation tax space 4.1 communication costs _ developpement et afrique.*.