Perhaps you should try some spelling variations:
development century » development center, development centers, development centre
truth communication » trough communication, touch communication, true communication
clean development » human development, urban development
technology state » technology strategy, technology system, technology study
state relations » state regulation, trade relations, race relations
crises truth » crises south
during clean » coming clean, during bleda, during coal
relations 5 » relations _, relations a, relations 3
century ad » century a, century _, century 1
5 crises » _ crises, 2 crises, 5 crisis

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

• Adding a wildcard symbol may retrieve word variants: technology state relations 5 crises truth communication during clean development century ad.*.