Perhaps you should try some spelling variations:
pollutants dispersion » pollutant dispersion, pollutants detection
pollution dispersion » pollutant dispersion
dimensionality » dimensional

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: "((\"pollutant ((dimension reduction) OR (dimensionality reduction))\") or (\"((pollutants dispersion) OR (pollution dispersion)) reduction\"))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"pollutant ((dimension reduction) or (dimensionality reduction))\\") or (\\"((pollutants dispersion) OR (pollution dispersion)) reduction\\"))\"".
• Removing quotes may allow a broader search: (( pollutant ((dimension reduction) or (dimensionality reduction)) ) or ( ((pollutants dispersion) OR (pollution dispersion)) reduction )).