Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
vote communication » voice communication, ante communication, remote communication
technologies 2.1 » technologies _, technologies 4, technologies a
development case » development china
oil development » rail development, tool development, social development
2.1 relations » 2.2 relations, 2.4 relations, 8.1 relations
relations der » relations under, relations das, relations do
prices vote » prices more, promises vote, prices power
der prices » user prices, debt prices, do prices
case labor » care labor, based labor, male labor
cost oil » post oil, bust oil, cost iii

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 relations der prices vote communication cost oil development case labor.*.