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)
"45 c decrease" » "45 c decreased" (Expand Search), "45 c increase" (Expand Search)
"50 _ decrease" » "50 _ decreased" (Expand Search), "50 _ 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"5 nn decrease\") OR (((\"45 c decrease\") OR (((\"50 _ decrease\") OR (\"5 nm decrease\"))))))~".
• Removing quotes may allow a broader search: (( 5 nn decrease ) OR ((( 45 c decrease ) OR ((( 50 _ decrease ) OR ( 5 nm decrease ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("5 nn decrease") OR ((("45 c decrease") OR ((("50 _ decrease") OR ("5 nm decrease"))))))*.