Perhaps you should try some spelling variations:
clear development » clean development, clean developoment, car development
new relationship » a relationship, 3.3 relationship, 3.2 relationship
relationship 22 » relationship 2, relationship 4.2, relationship 7.2
3 communication » 4 communication, de communication, data communication
technology new » technologies new, technology needs, technology 1
22 crisis » 2.2 crisis, 2 crisis, 12 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 new relationship 22 crisis 3 communication costs clear development _ artic.*.