Perhaps you should try some spelling variations:
pollutants dispersion » pollutant dispersion, pollution dispersion, pollutants detection
pollutants distortion » pollutants dissolution, pollutants distribution, pollutants detection
distortion prediction » distribution prediction, destination prediction, detection prediction
dispersion reduction » dispersion prediction, dispersion predictions, dimension reduction

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: (( pollutants dispersion reduction ) OR ( pollutants distortion prediction )).
• Adding a wildcard symbol may retrieve word variants: (( pollutants dispersion reduction ) or ( pollutants distortion prediction ))*.