Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
mental development » mineral development, capital development, spatial development
inflation space » information space, innovation space, inflation rate
technology dlt » technology data, technology debts, technology 21st
development en » developpement en, development menu, development eco
dlt inflation » der inflation, die inflation, d inflation
costs mental » costs meat, costs rent
space space » space place, place space, space race
space 3.1 » space 2.1, space 3.2, space 3.3

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

• Adding a wildcard symbol may retrieve word variants: technology dlt inflation space space 3.1 communications costs mental development en afrique.*.