Perhaps you should try some spelling variations:
"50 n_ decrease" » "50 nn decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "50 ns decrease" (Expand Search), "50 ng decrease" (Expand Search), "50 ns_ decrease" (Expand Search), "50 ng_ decrease" (Expand Search), "50 μ_ decrease" (Expand Search)
"50 ms decrease" » "50 a decrease" (Expand Search), "50 nn decrease" (Expand Search), "50 mean decrease" (Expand Search), "50 mg decrease" (Expand Search), "50 mm decrease" (Expand Search)
"50 n decrease" » "50 nn decrease" (Expand Search), "50 a decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 ns decrease" (Expand Search), "50 ng decrease" (Expand Search), "50 μ decrease" (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: "((\"50 n_ decrease\") OR (((((\"50 n decrease\") OR (\"50 ms decrease\"))) OR (\"50 _ decrease\"))))~".
• Removing quotes may allow a broader search: (( 50 n_ decrease ) OR ((((( 50 n decrease ) OR ( 50 ms decrease ))) OR ( 50 _ decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (("50 n_ decrease") OR ((((("50 n decrease") OR ("50 ms decrease"))) OR ("50 _ decrease"))))*.