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)
"5 ng decrease" » "5 nn decrease" (Expand Search), "5 a decrease" (Expand Search), "5 we decrease" (Expand Search), "5 mg decrease" (Expand Search), "5 g decrease" (Expand Search), "5 nm 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 (((\"5 ng decrease\") OR (\"50 _ decrease\"))))) OR (\"50 n decrease\"))~".
• Removing quotes may allow a broader search: (((( 50 n_ decrease ) OR ((( 5 ng decrease ) OR ( 50 _ decrease ))))) OR ( 50 n decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((("50 n_ decrease") OR ((("5 ng decrease") OR ("50 _ decrease"))))) OR ("50 n decrease"))*.