Perhaps you should try some spelling variations:
communication cross » communication costs
technology social » technology series
social convention » social conventions, social connection, social connections
convention frame » prevention frame, conservation frame, convention shared
de communication » mobile communication, online communication
development case » development china
cross network » across network, crisis network, class network
frame phase » frame past, frame change
phase de » phase der, phase des, phase die
case can » case case, case c

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

• Adding a wildcard symbol may retrieve word variants: technology social convention frame phase de communication cross network development case can.*.