Perhaps you should try some spelling variations:
rural communications » oral communication, rural telecommunications, cultural communications
communications costs » communication costs, communications _
development cases » development case, development phases, development based
series function » services functions, service function, versus function
function across » functions across, functions cross, education across
cases africa » crises africa, passes africa, rates africa
across how » across rows, across new
how rural » how real, new rural, do rural
costs 2 » costs 20, costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology series function across how rural communications costs 2 development cases africa.*.