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 ng decrease" (Expand Search), "50 n decrease" (Expand Search), "59 nn decrease" (Expand Search)
"50 mg decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 we decrease" (Expand Search)
"50 ns decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 we decrease" (Expand Search)
"50 ms decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 mean decrease" (Expand Search), "50 mm decrease" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("50 nn decrease") OR ("50 mg decrease"))) OR ((("50 ns decrease") OR ("50 ms decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"50 nn decrease\") OR (\"50 mg decrease\"))) OR (((\"50 ns decrease\") OR (\"50 ms decrease\"))))*".
• Removing quotes may allow a broader search: (((( 50 nn decrease ) OR ( 50 mg decrease ))) OR ((( 50 ns decrease ) OR ( 50 ms decrease ))))*.