Perhaps you should try some spelling variations:
clear development » clean development, clean developoment, car development
development after » developments after, development master, development matter
technology trade » technology trends, technology transfer, technology transfers
trade relations » trade regulation
3 communication » 4 communication, de communication, data communication
after aortic » after abortion, acute aortic, after art
relations 1 » relations _, relations a, relations 3
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 clear development after aortic.*.