Perhaps you should try some spelling variations:
del communication » cell communication, real communication, cell communications
clean development » human development, urban development
technology its » technology isst, technology ict, technology ii
its relations » its relation, les relations, its relationship
relations 11 » relations 1.1, relations 1, relations 14
costs clean » costs clear
crisis del » crisis desde
11 crisis » 19 crisis, 1 crisis, 3 crisis
a aortic » _ aortic, _ artic

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

• Adding a wildcard symbol may retrieve word variants: technology its relations 11 crisis del communication costs clean development a aortic.*.