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