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