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 n_ decrease" (Expand Search), "50 na decrease" (Expand Search), "50 n_ decreased" (Expand Search), "50 ns decrease" (Expand Search), "59 nn decrease" (Expand Search), "50 nsn decrease" (Expand Search), "50 _n decrease" (Expand Search), "50 cn decrease" (Expand Search)
"50 ng decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 we decrease" (Expand Search), "50 mg decrease" (Expand Search), "10 ng decrease" (Expand Search), "5 ng decrease" (Expand Search), "50 nsg decrease" (Expand Search), "50 _g decrease" (Expand Search), "50 cg decrease" (Expand Search)
"50 μ decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 _ decreased" (Expand Search), "10 μ decrease" (Expand Search), "5 μ decrease" (Expand Search)
"50 n decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 ns decrease" (Expand Search), "50 c 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 ng decrease"))) OR ((("50 n decrease") OR ("50 μ decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"50 nn decrease\") OR (\"50 ng decrease\"))) OR (((\"50 n decrease\") OR (\"50 μ decrease\"))))".
• Removing quotes may allow a broader search: (((( 50 nn decrease ) OR ( 50 ng decrease ))) OR ((( 50 n decrease ) OR ( 50 μ decrease )))).
• Adding a wildcard symbol may retrieve word variants: (((("50 nn decrease") OR ("50 ng decrease"))) OR ((("50 n decrease") OR ("50 μ decrease"))))*.