Perhaps you should try some spelling variations:
"significantly altered decrease" » "significantly affected decrease" (Expand Search), "significantly elevated decrease" (Expand Search), "significantly lower decrease" (Expand Search), "significantly altered release" (Expand Search), "significantly observed decrease" (Expand Search), "significantly teer decrease" (Expand Search)
"significantly marked decrease" » "significantly larger decrease" (Expand Search), "significantly linked decrease" (Expand Search), "significantly improved decrease" (Expand Search), "significantly marked 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 marked decrease\") OR (\"significantly altered decrease\"))~".
• Removing quotes may allow a broader search: (( significantly marked decrease ) OR ( significantly altered decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (("significantly marked decrease") OR ("significantly altered decrease"))*.