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 _n decrease" » "50 _ decrease" (Expand Search), "50 nn decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _nn decrease" (Expand Search), "50 __ decrease" (Expand Search), "50 _a decrease" (Expand Search)
"50 ns decrease" » "50 nn decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 ms decrease" (Expand Search), "50 ngs decrease" (Expand Search), "50 μs decrease" (Expand Search), "50 _s decrease" (Expand Search)
"50 n decrease" » "50 nn decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 a 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 ("50 mean decrease"))) OR ("50 ns decrease"))) OR ("50 n decrease"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"50 _n decrease\") OR (\"50 mean decrease\"))) OR (\"50 ns decrease\"))) OR (\"50 n decrease\"))".
• Removing quotes may allow a broader search: (((((( 50 _n decrease ) OR ( 50 mean decrease ))) OR ( 50 ns decrease ))) OR ( 50 n decrease )).
• Adding a wildcard symbol may retrieve word variants: (((((("50 _n decrease") OR ("50 mean decrease"))) OR ("50 ns decrease"))) OR ("50 n decrease"))*.