Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
2.1 communications » 3.1 communications, 4.1 communication, 1.1 communication
mental development » mineral development, capital development, spatial development
technology dlt » technology data, technology debts, technology 21st
dlt inflation » der inflation, die inflation, d inflation
development l » development li, development 1, development law
costs mental » costs meat, costs rent
rate space » state space, trace space, safe space
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: technology dlt inflation rate space 2.1 communications costs mental development l afrique.*.