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)
"_ nn decrease" » "_ _ decrease" (Expand Search), "_ ann decrease" (Expand Search), "_ cnn decrease" (Expand Search), "_ knn decrease" (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 (((\"_ we decrease\") OR (\"_ nn decrease\"))))~".
• Removing quotes may allow a broader search: (((( 50 ms decrease ) OR ( 50 ng decrease ))) OR ((( _ we decrease ) OR ( _ nn decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("50 ms decrease") OR ("50 ng decrease"))) OR ((("_ we decrease") OR ("_ nn decrease"))))*.