Perhaps you should try some spelling variations:
"50 ms decrease" » "50 _ decrease" (Expand Search)
"50 ng decrease" » "50 _ decrease" (Expand Search), "10 ng decrease" (Expand Search), "50 μg decrease" (Expand Search)
"5 a decrease" » "5 _ decrease" (Expand Search), "5 _ decreased" (Expand Search), "5 _ decreases" (Expand Search)
"_ e decrease" » "_ _ decrease" (Expand Search), "_ _ decreased" (Expand Search), "_ _ decreases" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"50 ms decrease\") OR (((\"50 ng decrease\") OR (\"5 a decrease\"))))) OR (\"_ e decrease\"))~".
• Removing quotes may allow a broader search: (((( 50 ms decrease ) OR ((( 50 ng decrease ) OR ( 5 a decrease ))))) OR ( _ e decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((("50 ms decrease") OR ((("50 ng decrease") OR ("5 a decrease"))))) OR ("_ e decrease"))*.