Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
sensors developed » less developed
risk inflation » risk information, rising inflation, risk inclination
inflation part » inflation pt, inflation target, information part
cost sensors » iot sensors, soft sensors, gas sensors
part iv » part i, part ii, part iii
iv mass » air mass, mit mass

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

• Adding a wildcard symbol may retrieve word variants: technology risk inflation part iv mass communication cost sensors developed _ afrique.*.