Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
rural development » social development
inflation rates » inflation rate
technology use » technology 1, technology 2.2, technology 3
use inflation » push inflation, und inflation, die inflation
rates where » states where, cases where, places where
where 3.1 » where 3.2, sphere 3.1, here 3.7

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

• Adding a wildcard symbol may retrieve word variants: technology use inflation rates where 3.1 communication cost rural development latin afrique.*.