Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
technology gaps » technology gap
inflation rates » inflation rate
gaps inflation » has inflation, grade inflation, rapid inflation
developing li » developing ai, developing l2, developing cil
rates spaces » places spaces, papers spaces, spaces spaces
4 developing » 3 developing
spaces 2.1 » space 2.1, spaces 1.1, spaces 1
li afrique » l afrique, en afrique
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 rates spaces 2.1 communication costs 4 developing li afrique.*.