Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
4 developpement » de developpement, le developpement, et developpement
technology use » technology 1, technology 2.2, technology 3
use inflation » push inflation, und inflation, die inflation
rate prices » gate prices, water prices, trade prices
des afrique » en afrique, de l'afrique
prices 2.1 » prices 2.4, prices 2.3, prices 3.1
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 use inflation rate prices 2.1 communication costs 4 developpement des afrique.*.