Perhaps you should try some spelling variations:
communication sports » communication efforts, communication secrets, communication spaces
de communication » mobile communication, online communication
study relations » study relationship, student relations, study reflections
relations 2.1 » relations 3.1, relations 1, relations _
2.1 crises » 2.1 crisis, 2011 crises, 2 crises
crises de » crises _, crises a, crises 2
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 study relations 2.1 crises de communication sports social development a aortic.*.