Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
technology usage » technology use, technology age, technology users
mine development » sme development, trade development, business development
usage inflation » wage inflation, age inflation, usage information
development en » developpement en, development menu, development eco
rate space » state space, trace space, safe space
costs mine » costs money, costs timing
space 3.2 » space 2.1

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

• Adding a wildcard symbol may retrieve word variants: technology usage inflation rate space 3.2 communication costs mine development en afrique.*.