Perhaps you should try some spelling variations:
"50 μ decrease" » "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "50 a decreased" (Expand Search), "10 μ decrease" (Expand Search), "5 μ decrease" (Expand Search)
"50 a decrease" » "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "5 a decrease" (Expand Search), "0 a decrease" (Expand Search), "50 k decrease" (Expand Search)
"50 c decrease" » "50 c decreased" (Expand Search), "50 rc decreased" (Expand Search), "50 _ decreased" (Expand Search), "5 c decrease" (Expand Search), "20 c decrease" (Expand Search), "30 c decrease" (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 a decrease\") OR (\"50 c decrease\"))) OR (\"50 μ decrease\"))) OR (\"50 _ decrease\"))~".
• Removing quotes may allow a broader search: (((((( 50 a decrease ) OR ( 50 c decrease ))) OR ( 50 μ decrease ))) OR ( 50 _ decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("50 a decrease") OR ("50 c decrease"))) OR ("50 μ decrease"))) OR ("50 _ decrease"))*.