Perhaps you should try some spelling variations:
"50 ns decrease" » "50 nn decrease" (Expand Search), "50 _ decrease" (Expand Search), "50 use decreased" (Expand Search), "50 ms decrease" (Expand Search)
"50 we decrease" » "50 _ decrease" (Expand Search), "50 nn decrease" (Expand Search), "50 mean decrease" (Expand Search)
"5 ng decrease" » "5 nn decrease" (Expand Search), "5 _ decrease" (Expand Search), "5 gy decreased" (Expand Search), "5 mg decrease" (Expand Search), "5 g decrease" (Expand Search), "5 nm 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 a decrease") OR ((((("50 ns decrease") OR ("50 we decrease"))) OR ("5 ng decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 a decrease\") OR (((((\"50 ns decrease\") OR (\"50 we decrease\"))) OR (\"5 ng decrease\"))))".
• Removing quotes may allow a broader search: (( 50 a decrease ) OR ((((( 50 ns decrease ) OR ( 50 we decrease ))) OR ( 5 ng decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("50 a decrease") OR ((((("50 ns decrease") OR ("50 we decrease"))) OR ("5 ng decrease"))))*.