Perhaps you should try some spelling variations:
"patterson decrease" » "pattern decrease" (Expand Search), "patterson decreased" (Expand Search), "patterson increase" (Expand Search)
"per decrease" » "per decreased" (Expand Search), "per increase" (Expand Search)
"peter decrease" » "peter decreased" (Expand Search), "peter increase" (Expand Search)
"mean decrease" » "mean decreased" (Expand Search), "mean increase" (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: "((((((\"patterson decrease\") OR (\"per decrease\"))) OR (\"peter decrease\"))) OR (\"mean decrease\"))~".
• Removing quotes may allow a broader search: (((((( patterson decrease ) OR ( per decrease ))) OR ( peter decrease ))) OR ( mean decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("patterson decrease") OR ("per decrease"))) OR ("peter decrease"))) OR ("mean decrease"))*.