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