Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
urban development » human development
de communication » mobile communication, online communication
technologies von » technologies co, technologies box, technologies can
von information » von informationen, can information
cost urban » most urban, worst urban, bust urban
pt 19 » pt 1, pt 10, pt 11
pt 9 » pt 2, pt 1, pt 3

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technologies von information ((pt 19) OR (pt 9)) de communication cost urban development 1 africa.~".
• Adding a wildcard symbol may retrieve word variants: technologies von information ((pt 19) OR (pt 9)) de communication cost urban development 1 africa.*.