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 _
et communication » et communicatione, get communication, debt communication
based cluster » based clustering, based customer, based causes
relation 4.3 » relations 4.3, relation 4.5, relation 5.3
4.3 crisis » 8.3 crisis, 13.3 crisis, 4 crisis
crisis et » crisis el, crisis en, crisis eu

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology _ relation 4.3 crisis et communication based cluster developments from a.*.