Perhaps you should try some spelling variations:
nn decrease » _ decrease (Expand Search), a decrease (Expand Search), mean decrease (Expand Search)
ng decrease » _ decrease (Expand Search), a decrease (Expand Search), we decrease (Expand Search)
c decrease » c decreased (Expand Search), _ decrease (Expand Search), a decrease (Expand Search)
50 ng » 50 mg (Expand Search), 10 ng (Expand Search), 5 ng (Expand Search)
5 nn » 5 non (Expand Search), 59 nn (Expand Search), 5 nm (Expand Search)
5 c » 25 c (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: "(( 5 nn decrease ) OR ((( 5 c decrease ) OR ( 50 ng decrease ))))~".
• Adding a wildcard symbol may retrieve word variants: (( 5 nn decrease ) OR ((( 5 c decrease ) OR ( 50 ng decrease ))))*.