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