Perhaps you should try some spelling variations:
development acute » development act, development route, development age
peter development » better development, center development, water development
technology trade » technology trends, technology transfer, technology transfers
trade relations » trade regulation
4 communication » 3 communication, 5.4 communication, de communication
acute aortic » after aortic
relations 1 » relations _, relations a, relations 3
costs peter » costs per, costs water, costs matter
1 crisis » 19 crisis
crisis 4 » 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 4 communication costs peter development acute aortic.*.