Perhaps you should try some spelling variations:
trough communication » through communication, thought communication, touch communication
communication cost » communication costs, communication costa, communications costs
urban development » human development
relation 3.5 » relations 3.5, relation 4.5, relation 3.3
role trough » roles through
cost urban » most urban, worst urban, bust urban
china can » china case
3.5 role » 5.5 role

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

• Adding a wildcard symbol may retrieve word variants: technology _ relation 3.5 role trough communication cost urban development china can.*.