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)
"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 mean decrease") OR ((((("50 n decrease") OR ("50 μs decrease"))) OR ("50 _g decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 mean decrease\") OR (((((\"50 n decrease\") OR (\"50 μs decrease\"))) OR (\"50 _g decrease\"))))".
• Removing quotes may allow a broader search: (( 50 mean decrease ) OR ((((( 50 n decrease ) OR ( 50 μs decrease ))) OR ( 50 _g decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("50 mean decrease") OR ((((("50 n decrease") OR ("50 μs decrease"))) OR ("50 _g decrease"))))*.