Perhaps you should try some spelling variations:
"50 ng decrease" » "50 nn decrease" (Expand Search), "50 we decrease" (Expand Search), "50 gy decreased" (Expand Search), "50 mg decrease" (Expand Search), "10 ng decrease" (Expand Search), "5 ng decrease" (Expand Search)
"50 ms decrease" » "50 nn decrease" (Expand Search), "50 mean decrease" (Expand Search), "50 use decreased" (Expand Search), "50 mg decrease" (Expand Search), "50 mm decrease" (Expand Search)
"10 a decrease" » "10 _ decreased" (Expand Search), "10 _ decreases" (Expand Search), "10 _ decrease" (Expand Search), "10 μ decrease" (Expand Search), "19 a 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 _ decrease") OR ((("50 ng decrease") OR ("10 a decrease"))))) OR ("50 ms decrease"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"50 _ decrease\") OR (((\"50 ng decrease\") OR (\"10 a decrease\"))))) OR (\"50 ms decrease\"))".
• Removing quotes may allow a broader search: (((( 50 _ decrease ) OR ((( 50 ng decrease ) OR ( 10 a decrease ))))) OR ( 50 ms decrease )).
• Adding a wildcard symbol may retrieve word variants: (((("50 _ decrease") OR ((("50 ng decrease") OR ("10 a decrease"))))) OR ("50 ms decrease"))*.