Perhaps you should try some spelling variations:
"50 mean decrease" » "50 a decrease" (Expand Search), "50 meann decrease" (Expand Search), "50 mea_ decrease" (Expand Search), "50 meaa decrease" (Expand Search), "20 means decrease" (Expand Search)
"5 ng decrease" » "5 nn decrease" (Expand Search), "5 _ decrease" (Expand Search), "5 a decrease" (Expand Search), "5 mg decrease" (Expand Search), "5 g decrease" (Expand Search), "5 nm decrease" (Expand Search)
"10 nm decrease" » "10 nn decrease" (Expand Search), "10 _ decrease" (Expand Search), "10 a decrease" (Expand Search), "100 nm decrease" (Expand Search), "10 mm 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)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("50 mean decrease") OR ((("50 n decrease") OR ((("5 ng decrease") OR ("10 nm decrease"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 mean decrease\") OR (((\"50 n decrease\") OR (((\"5 ng decrease\") OR (\"10 nm decrease\"))))))*".
• Removing quotes may allow a broader search: (( 50 mean decrease ) OR ((( 50 n decrease ) OR ((( 5 ng decrease ) OR ( 10 nm decrease ))))))*.