Perhaps you should try some spelling variations:
pattern development » western development, better development, patent development
technology trade » technology trends, technology transfer, technology transfers
trade relations » trade regulation
3 communication » 4 communication, de communication, data communication
development age » development stage, development a, development aid
costs pattern » costs matter, costs peter, costs water
relations 1 » relations _, relations a, relations 3
age aortic » acute aortic, after aortic
1 crisis » 19 crisis
crisis 3 » crisis _, crisis a, crisis 1

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

• Adding a wildcard symbol may retrieve word variants: technology trade relations 1 crisis 3 communication costs pattern development age aortic.*.