Perhaps you should try some spelling variations:
"50 meann decrease" » "50 mean decrease" (Expand Search), "50 nn decrease" (Expand Search), "50 meannn decrease" (Expand Search), "50 mean_ decrease" (Expand Search), "50 meana decrease" (Expand Search), "5 means decrease" (Expand Search), "20 means decrease" (Expand Search)
"50 ngn decrease" » "50 nn decrease" (Expand Search), "50 mean decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 ngnn decrease" (Expand Search), "50 ng_ decrease" (Expand Search), "50 nga decrease" (Expand Search), "50 ng decrease" (Expand Search), "50 nsgn decrease" (Expand Search), "50 nggn decrease" (Expand Search), "50 μgn decrease" (Expand Search)
"50 μgn decrease" » "50 μgnn decrease" (Expand Search), "50 μg_ decrease" (Expand Search), "50 μga 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 ngn decrease") OR ("50 μgn decrease"))) OR ("50 meann decrease"))) OR ("50 n decrease"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"50 ngn decrease\") OR (\"50 μgn decrease\"))) OR (\"50 meann decrease\"))) OR (\"50 n decrease\"))".
• Removing quotes may allow a broader search: (((((( 50 ngn decrease ) OR ( 50 μgn decrease ))) OR ( 50 meann decrease ))) OR ( 50 n decrease )).
• Adding a wildcard symbol may retrieve word variants: (((((("50 ngn decrease") OR ("50 μgn decrease"))) OR ("50 meann decrease"))) OR ("50 n decrease"))*.