Perhaps you should try some spelling variations:
aged communication » based communication, ageist communication, aided communications
change development » changing development, chinese development, enhance development
development master » development matters, development chapter, development pattern
relations 2.5 » relations 2.1, relations 2.4, relations 7.5
technology 1 » technology _
costs change » costs chapter, costs case, costs china
1 relations » 3 relations, a relations, 1.2 relations
crisis aged » crisis agenda, crisis changed, crisis after
2.5 crisis » 2.1 crisis, 2.2 crisis, 2 crisis
err. » kerr., herr.

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

• Adding a wildcard symbol may retrieve word variants: technology 1 relations 2.5 crisis aged communication costs change development master err.*.