Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
oral communications » oral communication, rural communications, moral communication
development mode » development model, development models, development module
technology role » technology's role, technology risk, technology r
3.1 development » 2 development
mode americans » modern americans, modern american, modern americas
role region » core region, one region, rice region
region das » region des, region dos, region data
costs 3.1 » costs 3.5, costs 4.1, costs 2.1
volk » vol, folk

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

• Adding a wildcard symbol may retrieve word variants: technology role region das volk oral communications costs 3.1 development mode americans.*.