Perhaps you should try some spelling variations:
"50 ns decrease" » "50 nn decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 use decreased" (Expand Search), "50 ms decrease" (Expand Search)
"50 ng decrease" » "50 nn decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 gy decreased" (Expand Search), "50 mg decrease" (Expand Search), "10 ng decrease" (Expand Search), "5 ng decrease" (Expand Search)
"50 we decrease" » "50 _ decrease" (Expand Search), "50 nn decrease" (Expand Search), "50 mean decrease" (Expand Search)
"5 a decrease" » "5 _ decrease" (Expand Search), "5 _ decreased" (Expand Search), "5 _ decreases" (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 a decrease\") OR (((\"50 ns decrease\") OR (((\"50 ng decrease\") OR (\"50 we decrease\"))))))~".
• Removing quotes may allow a broader search: (( 5 a decrease ) OR ((( 50 ns decrease ) OR ((( 50 ng decrease ) OR ( 50 we decrease ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("5 a decrease") OR ((("50 ns decrease") OR ((("50 ng decrease") OR ("50 we decrease"))))))*.