Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technology effort » technology efforts, technology export, technology report
effort training » export training, exports training, effort obtaining
2 communication » 3 communication, 4 communication, 1 communication
development age » development stage, development a, development aid
1 political » 2 political, 4 political, 3 political
political 2 » political 27, political _, political 1
training 1 » training _, training 4, training a
cost human » post human, lost human, boost human
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 1 political 2 communication cost human development age aortic.*.