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 1.3 » relations 10.3, relations 14.3, relations 6.3
cross better » crisis better, access better, cross border
1.3 crisis » 13.3 crisis, 1.1 crisis, 13 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 1.3 crisis 4 communication cross better development fund aortic.*.