Perhaps you should try some spelling variations:
clean development » human development, urban development
et communication » et communicatione, get communication, debt communication
technology 2.2 » technology _, technology 1, technology 3
2.2 relational » 5.2 relational, 4.2 relational, 2.3 relational
relational 1.1 » relations 1.1, relational 2.4, relational _
costs clean » costs clear
1.1 crisis » 11 crisis, 2.1 crisis, 3.1 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 2.2 relational 1.1 crisis et communication costs clean development _ artic.*.