Perhaps you should try some spelling variations:
"50 nn decrease" » "50 _ decrease" (Expand Search), "50 mean decrease" (Expand Search), "50 gy decreased" (Expand Search), "50 n_ decrease" (Expand Search), "50 n_ decreased" (Expand Search), "50 n_ decreases" (Expand Search), "50 ns decrease" (Expand Search), "50 ng decrease" (Expand Search), "59 nn decrease" (Expand Search), "50 nsn decrease" (Expand Search), "50 ngn decrease" (Expand Search), "50 μn decrease" (Expand Search)
"50 a decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "50 μ decrease" (Expand Search), "50 c decrease" (Expand Search)
"50 μgsa decrease" » "50 μgs_ decrease" (Expand Search), "50 μgs_ decreased" (Expand Search), "50 μgs_ decreases" (Expand Search)
"50 n decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (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 nn decrease") OR ("50 a decrease"))) OR ("50 μgsa decrease"))) OR ("50 n decrease"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"50 nn decrease\") OR (\"50 a decrease\"))) OR (\"50 μgsa decrease\"))) OR (\"50 n decrease\"))".
• Removing quotes may allow a broader search: (((((( 50 nn decrease ) OR ( 50 a decrease ))) OR ( 50 μgsa decrease ))) OR ( 50 n decrease )).
• Adding a wildcard symbol may retrieve word variants: (((((("50 nn decrease") OR ("50 a decrease"))) OR ("50 μgsa decrease"))) OR ("50 n decrease"))*.