Perhaps you should try some spelling variations:
"significantly reported decrease" » "significantly related decrease" (Expand Search), "significantly restored decrease" (Expand Search), "significantly predicted decrease" (Expand Search), "significantly reported disease" (Expand Search), "significantly reported depressive" (Expand Search), "significantly reported case" (Expand Search)
"significantly linear decrease" » "significant linear decrease" (Expand Search), "significantly lower decrease" (Expand Search), "significantly longer decrease" (Expand Search), "significantly linear 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: "((\"significantly reported decrease\") OR (\"significantly linear decrease\"))~".
• Removing quotes may allow a broader search: (( significantly reported decrease ) OR ( significantly linear decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (("significantly reported decrease") OR ("significantly linear decrease"))*.