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