Perhaps you should try some spelling variations:
"5 ng decrease" » "5 nn decrease" (Expand Search), "5 _ decrease" (Expand Search), "5 a decrease" (Expand Search), "5 g decrease" (Expand Search), "5 nm decrease" (Expand Search), "5 kg decrease" (Expand Search)
"5 mg decrease" » "5 _ decrease" (Expand Search), "5 a decrease" (Expand Search), "5 nn decrease" (Expand Search), "5 mm decrease" (Expand Search)
"50 _g decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "50 mg decrease" (Expand Search), "50 ng decrease" (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 ng decrease" (Expand Search), "50 μ 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 n decrease") OR ((((("5 ng decrease") OR ("5 mg decrease"))) OR ("50 _g decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 n decrease\") OR (((((\"5 ng decrease\") OR (\"5 mg decrease\"))) OR (\"50 _g decrease\"))))".
• Removing quotes may allow a broader search: (( 50 n decrease ) OR ((((( 5 ng decrease ) OR ( 5 mg decrease ))) OR ( 50 _g decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("50 n decrease") OR ((((("5 ng decrease") OR ("5 mg decrease"))) OR ("50 _g decrease"))))*.