Perhaps you should try some spelling variations:
downward communication » towards communication, aware communication, hazard communication
communication 12.1.1 » communication 12.1.2, communication 12.1.3, communication 12.1.4
technologies varies » technologies series, technologies barriers, technologies value
varies information » various information, series information, paris information
developing cities » developing countries, developing annuities, developing economies
information act » information age, information a, information about
a developing » a development
cities die » cities dis, cities due, cities do
12.1.1 a » 12.1.1 ai, 2.1.1 a, 1.1.1 a

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

• Adding a wildcard symbol may retrieve word variants: technologies varies information act _ downward communication 12.1.1 a developing cities die.*.