Perhaps you should try some spelling variations:
"50 ng decrease" » "50 nn decrease" (Expand Search), "50 a decrease" (Expand Search), "50 we decrease" (Expand Search), "50 mg decrease" (Expand Search), "5 ng decrease" (Expand Search), "50 ns decrease" (Expand Search)
"10 ng decrease" » "10 nn decrease" (Expand Search), "10 a decrease" (Expand Search), "10 we decrease" (Expand Search), "100 ng decrease" (Expand Search), "10 mg decrease" (Expand Search)
"10 nm decrease" » "10 nn decrease" (Expand Search), "10 a decrease" (Expand Search), "10 we decrease" (Expand Search), "100 nm decrease" (Expand Search), "10 mm 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 _ decrease") OR ((("50 ng decrease") OR ((("10 ng decrease") OR ("10 nm decrease"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 _ decrease\") OR (((\"50 ng decrease\") OR (((\"10 ng decrease\") OR (\"10 nm decrease\"))))))".
• Removing quotes may allow a broader search: (( 50 _ decrease ) OR ((( 50 ng decrease ) OR ((( 10 ng decrease ) OR ( 10 nm decrease )))))).
• Adding a wildcard symbol may retrieve word variants: (("50 _ decrease") OR ((("50 ng decrease") OR ((("10 ng decrease") OR ("10 nm decrease"))))))*.