Perhaps you should try some spelling variations:
"significantly impacter decrease" » "significantly impact decrease" (Expand Search), "significantly impacts decrease" (Expand Search), "significantly impacting decrease" (Expand Search), "significantly greater decrease" (Expand Search)
"significantly improves decrease" » "significantly improved decrease" (Expand Search), "significantly improve decrease" (Expand Search), "significantly improving decrease" (Expand Search), "significantly improves disease" (Expand Search), "significantly improve disease" (Expand Search), "significantly improved urease" (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 impacter decrease\") OR (\"significantly improves decrease\"))~".
• Removing quotes may allow a broader search: (( significantly impacter decrease ) OR ( significantly improves decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (("significantly impacter decrease") OR ("significantly improves decrease"))*.