Perhaps you should try some spelling variations:
"significantly mediate decrease" » "significantly mediated decrease" (Expand Search), "significantly predicted decrease" (Expand Search), "significantly mitigated decrease" (Expand Search), "significantly mean decrease" (Expand Search), "significantly mediated defense" (Expand Search)
"significantly linked decrease" » "significantly longer decrease" (Expand Search), "significantly altered decrease" (Expand Search), "significantly higher decrease" (Expand Search), "significantly marked decrease" (Expand Search), "significantly linear 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: "((\"significantly mediate decrease\") OR (\"significantly linked decrease\"))~".
• Removing quotes may allow a broader search: (( significantly mediate decrease ) OR ( significantly linked decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (("significantly mediate decrease") OR ("significantly linked decrease"))*.