Perhaps you should try some spelling variations:
cluster developments » cluster development, later developments, further developments
communication based » communication united, communication brazil, communication barriers
developments from » development from, developments after, developments _
i communication » ii communication, ai communication, 3 communication
relation 13.3 » relation 3.3, relation 4.3, relation 5.3
based cluster » based clustering, based customer, based causes
technology 3 » technology _, technology 1, technology 4
13.3 crisis » 13.2 crisis, 3.1 crisis, 1.1 crisis
3 relation » 3 relations, _ relation, 5 relation
crisis i » 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 3 relation 13.3 crisis i communication based cluster developments from a.*.