Perhaps you should try some spelling variations:
"_ 2d decrease" » "_ 3d decrease" (Expand Search), "_ pd decrease" (Expand Search), "_ 2 decrease" (Expand Search), "_ 2d decreased" (Expand Search), "_ 2d increase" (Expand Search)
"50 _ decrease" » "50 _ decreased" (Expand Search), "50 _ increase" (Expand Search)
"1 0 decrease" » "1 0 decreased" (Expand Search), "1 0 increase" (Expand Search)
"50 ng decrease" » "50 ng decreased" (Expand Search), "50 ng increase" (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 _ decrease\") OR (((((\"1 0 decrease\") OR (\"_ 2d decrease\"))) OR (\"50 ng decrease\"))))~".
• Removing quotes may allow a broader search: (( 50 _ decrease ) OR ((((( 1 0 decrease ) OR ( _ 2d decrease ))) OR ( 50 ng decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (("50 _ decrease") OR ((((("1 0 decrease") OR ("_ 2d decrease"))) OR ("50 ng decrease"))))*.