Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technology effort » technology efforts, technology export, technology report
urban development » human development
effort training » export training, exports training, effort obtaining
2 communication » 3 communication, 4 communication, 1 communication
development age » development stage, development a, development aid
political 2 » political 27, political _, political 1
training a » training _, training 4, training data
cost urban » most urban, worst urban, bust urban
age aortic » acute aortic, after aortic

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

• Adding a wildcard symbol may retrieve word variants: technology effort training a political 2 communication cost urban development age aortic.*.