Perhaps you should try some spelling variations:
communication costly » communication costs, communication costa, communications costs
trade developments » trade development, rate developments, price developments
technology shock » technology shocks, technology social, technology study
shock attention » shock alienation, shock prevention, theory attention
attention one » attention over, attention some, attention model
costly trade » costs trade, country trade, costly than
does mobile » das mobile

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

• Adding a wildcard symbol may retrieve word variants: technology shock attention one does mobile communication costly trade developments _ car.*.