Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
oral communications » oral communication, rural communications, moral communication
technology rural » technology moral, technology neutral, technology road
development mode » development model, development models, development module
4.1 development » 3.1 development, 2.1 development, 2.3 development
mode americans » modern americans, modern american, modern americas
rural region » rural regions
region als » region al, religion als, regionen als
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
als volk » das volk, als vor

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

• Adding a wildcard symbol may retrieve word variants: technology rural region als volk oral communications costs 4.1 development mode americans.*.