Perhaps you should try some spelling variations:
"50 ngn decrease" » "50 mean decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 gy decreased" (Expand Search), "50 ng decrease" (Expand Search)
"50 ns decrease" » "50 _ decrease" (Expand Search), "50 we decrease" (Expand Search), "50 use decreased" (Expand Search), "50 ms decrease" (Expand Search)
"50 nn decrease" » "50 _ decrease" (Expand Search), "50 mean decrease" (Expand Search), "50 gy decreased" (Expand Search), "50 ng decrease" (Expand Search), "50 n decrease" (Expand Search), "59 nn 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)

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