Perhaps you should try some spelling variations:
volumetric radial » volumetric medical, volumetric cardiac, volumetric real
goes volumetric » gases volumetric, gas volumetric, model volumetric
radial threats » radicals threats, racial threat, radial thrusts
iet world » iot world, ict world, int world
net world » next world, best world, text world

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

• If you are trying to use Boolean operators, they must be ALL CAPS: 2008 ((iet world) OR (net world)) goes volumetric radial threats*.