Perhaps you should try some spelling variations:
1.1 communication » 4.1 communication, 1.3 communication, 1.4 communication
technology gaps » technology gap
inflation rates » inflation rate
gaps inflation » has inflation, grade inflation, rapid inflation
developing en » developing e, developing eq, developing egg
rates spaces » places spaces, papers spaces, spaces spaces
4 developing » 3 developing
spaces 1.1 » spaces 2.1
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 1.1 communication costs 4 developing en afrique.*.