Perhaps you should try some spelling variations:
"50 ca decrease" » "50 _ decrease" (Expand Search), "50 c_ decrease" (Expand Search), "50 c_ decreased" (Expand Search), "50 c_ decreases" (Expand Search)
"50 ms decrease" » "50 _ decrease" (Expand Search)
"50 a decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "5 a decrease" (Expand Search), "50 i decrease" (Expand Search)
"50 n decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "50 i 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 ca decrease\") OR (\"50 ms decrease\"))) OR (\"50 a decrease\"))) OR (\"50 n decrease\"))~".
• Removing quotes may allow a broader search: (((((( 50 ca decrease ) OR ( 50 ms decrease ))) OR ( 50 a decrease ))) OR ( 50 n decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("50 ca decrease") OR ("50 ms decrease"))) OR ("50 a decrease"))) OR ("50 n decrease"))*.