Perhaps you should try some spelling variations:
communication cross » communication costs
better development » western development, between development, sector development
technology class » technology glass, technology case, technology cross
class relations » les relations, class recreation
4 communication » 3 communication, 5.4 communication, de communication
relations 1.1 » relations 2.1, relations 3.1, relations 5.1
cross better » crisis better, access better, cross border
1.1 crisis » 11 crisis, 2.1 crisis, 3.1 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 class relations 1.1 crisis 4 communication cross better development fund aortic.*.