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)
"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 we decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 mean decrease" (Expand Search)
"5 c decrease" » "5 c decreased" (Expand Search), "5 _ decrease" (Expand Search), "5 a decrease" (Expand Search), "25 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: "((\"5 c decrease\") OR (((((\"50 nn decrease\") OR (\"5 ng decrease\"))) OR (\"50 we decrease\"))))~".
• Removing quotes may allow a broader search: (( 5 c decrease ) OR ((((( 50 nn decrease ) OR ( 5 ng decrease ))) OR ( 50 we decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (("5 c decrease") OR ((((("50 nn decrease") OR ("5 ng decrease"))) OR ("50 we decrease"))))*.