Perhaps you should try some spelling variations:
"_ 20 decrease" » "_ 204 decrease" (Expand Search), "_ 2 decrease" (Expand Search), "_ 2d decrease" (Expand Search), "_ 20 decreased" (Expand Search), "_ 20 increase" (Expand Search)
"50 _ decrease" » "50 _ decreased" (Expand Search), "50 _ increase" (Expand Search)
"1 20 decrease" » "1 20 decreased" (Expand Search), "1 20 increase" (Expand Search)
"50 ng decrease" » "50 ng decreased" (Expand Search), "50 ng increase" (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 ((((("1 20 decrease") OR ("_ 20 decrease"))) OR ("50 ng decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 _ decrease\") OR (((((\"1 20 decrease\") OR (\"_ 20 decrease\"))) OR (\"50 ng decrease\"))))".
• Removing quotes may allow a broader search: (( 50 _ decrease ) OR ((((( 1 20 decrease ) OR ( _ 20 decrease ))) OR ( 50 ng decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("50 _ decrease") OR ((((("1 20 decrease") OR ("_ 20 decrease"))) OR ("50 ng decrease"))))*.