Perhaps you should try some spelling variations:
"50 ns decrease" » "50 nn decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 we decrease" (Expand Search), "50 ms decrease" (Expand Search)
"100 ng decrease" » "100 nn decrease" (Expand Search), "100 _ decrease" (Expand Search), "100 we decrease" (Expand Search), "100 mg decrease" (Expand Search), "100 nm decrease" (Expand Search), "100 ns decrease" (Expand Search)
"50 a decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "50 μ decrease" (Expand Search), "50 c 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 a decrease\") OR (((\"50 ns decrease\") OR (\"100 ng decrease\"))))~".
• Removing quotes may allow a broader search: (( 50 a decrease ) OR ((( 50 ns decrease ) OR ( 100 ng decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (("50 a decrease") OR ((("50 ns decrease") OR ("100 ng decrease"))))*.