Perhaps you should try some spelling variations:
calculations phase » calculations charge, calculations based, calculations chapter
open communication » human communication, 3 communication, 4 communication
communication cost » communication costs, communication costa, communications costs
urban development » human development
development model » development models, development middle
technologies 2 » technologies _, technologies 4
2 calculations » _ calculations, 2 calculation, 1 calculations
cost urban » most urban, worst urban, bust urban

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 calculations phase _ open communication cost urban development model afrique.*.