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)
"_ we decrease" » "_ _ decrease" (Expand Search), "_ web decrease" (Expand Search), "_ e decrease" (Expand Search), "_ fe decrease" (Expand Search)
"5 a decrease" » "5 _ decrease" (Expand Search), "5 _ decreased" (Expand Search), "5 _ 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 (\"5 a decrease\"))) OR (\"50 ng decrease\"))) OR (\"_ we decrease\"))~".
• Removing quotes may allow a broader search: (((((( 50 ms decrease ) OR ( 5 a decrease ))) OR ( 50 ng decrease ))) OR ( _ we decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("50 ms decrease") OR ("5 a decrease"))) OR ("50 ng decrease"))) OR ("_ we decrease"))*.