Perhaps you should try some spelling variations:
"5 ppm decrease" » "5 ppm decreased" (Expand Search), "5 ppm increase" (Expand Search)
"_ co2 decrease" » "_ co2 decreased" (Expand Search), "_ co2 increase" (Expand Search)
"5 nm decrease" » "5 nm decreased" (Expand Search), "5 nm increase" (Expand Search)
"3d point decrease" » "3d point decreased" (Expand Search), "3d point increase" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"5 ppm decrease\") OR (((((\"_ co2 decrease\") OR (\"5 nm decrease\"))) OR (\"3d point decrease\"))))~".
• Removing quotes may allow a broader search: (( 5 ppm decrease ) OR ((((( _ co2 decrease ) OR ( 5 nm decrease ))) OR ( 3d point decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (("5 ppm decrease") OR ((((("_ co2 decrease") OR ("5 nm decrease"))) OR ("3d point decrease"))))*.