Perhaps you should try some spelling variations:
"pollutant dimensionality reduction" » "following dimensionality reduction", "including dimensionality reduction", "modular dimensionality reduction"
"pollutants dispersion reduction" » "pollutant dispersion reduction", "pollution dispersion reduction", "pollutants detection reduction", "pollutants dispersion prediction", "pollutants dispersion predictions", "pollutants 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: (("pollutant dimensionality reduction") OR ("pollutants dispersion reduction"))*.
• Removing quotes may allow a broader search: (( pollutant dimensionality reduction ) or ( pollutants dispersion reduction ))*.