Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
cell communication » cell communications, oral communication, verbal communication
relations 2.2.7 » relations 1.2.1, relations 1.2.3, relations 2.1.2
per development » power development, spur development, oer developments
technology les » technology led, technology lays, technology lead
les relations » rules regulations
2.2.7 crisis » 2.2.2 crisis, 2.2 crisis, 2.3.1 crisis
crisis cell » crisis could, crisis chile

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

• Adding a wildcard symbol may retrieve word variants: technology les relations 2.2.7 crisis cell communication cost per development _ artic.*.