Perhaps you should try some spelling variations:
"5 nn decrease" » "k nn decrease" (Expand Search), "_ nn decrease" (Expand Search), "5 nn decreased" (Expand Search), "5 nn increase" (Expand Search)
"5 ppm decrease" » "5 ppm decreased" (Expand Search), "5 ppm increase" (Expand Search)
"a point decrease" » "a point decreased" (Expand Search), "a point increase" (Expand Search)
"5 nm decrease" » "5 nm decreased" (Expand Search), "5 nm increase" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("5 ppm decrease") OR ("5 nn decrease"))) OR ((("a point decrease") OR ("5 nm decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"5 ppm decrease\") OR (\"5 nn decrease\"))) OR (((\"a point decrease\") OR (\"5 nm decrease\"))))".
• Removing quotes may allow a broader search: (((( 5 ppm decrease ) OR ( 5 nn decrease ))) OR ((( a point decrease ) OR ( 5 nm decrease )))).
• Adding a wildcard symbol may retrieve word variants: (((("5 ppm decrease") OR ("5 nn decrease"))) OR ((("a point decrease") OR ("5 nm decrease"))))*.