Perhaps you should try some spelling variations:
"50 ng decrease" » "50 nn decrease" (Expand Search), "50 we decrease" (Expand Search), "50 gy decreased" (Expand Search), "50 ngy decreased" (Expand Search), "50 n_ decreased" (Expand Search), "50 n_ decreases" (Expand Search), "50 mg decrease" (Expand Search), "10 ng decrease" (Expand Search), "5 ng decrease" (Expand Search)
"59 a decrease" » "59 _ decreased" (Expand Search), "59 _ decreases" (Expand Search), "19 a decrease" (Expand Search), "59 0 decrease" (Expand Search), "5 a decrease" (Expand Search)
"5 g decrease" » "5 gy decreased" (Expand Search), "5 _ decreased" (Expand Search), "5 _ decreases" (Expand Search), "5 mg decrease" (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 ((("59 a decrease") OR ((("50 ng decrease") OR ("5 g decrease"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 _ decrease\") OR (((\"59 a decrease\") OR (((\"50 ng decrease\") OR (\"5 g decrease\"))))))".
• Removing quotes may allow a broader search: (( 50 _ decrease ) OR ((( 59 a decrease ) OR ((( 50 ng decrease ) OR ( 5 g decrease )))))).
• Adding a wildcard symbol may retrieve word variants: (("50 _ decrease") OR ((("59 a decrease") OR ((("50 ng decrease") OR ("5 g decrease"))))))*.