Perhaps you should try some spelling variations:
"50 ng decrease" » "50 nn decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 a 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" » "5 _ decrease" (Expand Search), "5 a decrease" (Expand Search), "5 _ decreased" (Expand Search)
"50 n decrease" » "50 nn decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 ns decrease" (Expand Search), "50 c decrease" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("50 ng decrease") OR ((((("50 n decrease") OR ("50 μ decrease"))) OR ("5 μ decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 ng decrease\") OR (((((\"50 n decrease\") OR (\"50 μ decrease\"))) OR (\"5 μ decrease\"))))".
• Removing quotes may allow a broader search: (( 50 ng decrease ) OR ((((( 50 n decrease ) OR ( 50 μ decrease ))) OR ( 5 μ decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("50 ng decrease") OR ((((("50 n decrease") OR ("50 μ decrease"))) OR ("5 μ decrease"))))*.