Perhaps you should try some spelling variations:
nn decrease » a decrease (Expand Search), mean decrease (Expand Search), gy decreased (Expand Search)
μ decrease » a decrease (Expand Search), _ decreased (Expand Search), _ decreases (Expand Search)
c decrease » c decreased (Expand Search), a decrease (Expand Search), rc decreased (Expand Search)
50 nn » 50 ns (Expand Search), 50 ng (Expand Search), 50 n (Expand Search)
50 μ » 10 μ (Expand Search), 5 μ (Expand Search)
20 c » 2 c (Expand Search), 20 _ (Expand Search), 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: "(((( 50 nn decrease ) OR ( 50 _ decrease ))) OR ((( 20 c decrease ) OR ( 50 μ decrease ))))~".
• Adding a wildcard symbol may retrieve word variants: (((( 50 nn decrease ) OR ( 50 _ decrease ))) OR ((( 20 c decrease ) OR ( 50 μ decrease ))))*.