Perhaps you should try some spelling variations:
technological models » technological model, technological tools, technological skills
communication cost » communication costs, communication costa, communications costs
urban development » human development
a communication » la communication, data communication, data communications
models leading » models learning, ideas leading, models hedging
state politics » states politics, state policies, state policy
leading state » leading starts, leading star, reading stage
politics a » politics _
cost urban » most urban, worst urban, bust urban
a aortic » _ aortic, _ artic

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

• Adding a wildcard symbol may retrieve word variants: technological models leading state politics a communication cost urban development a aortic.*.