Perhaps you should try some spelling variations:
"ct largest decrease" » "ct largest decreases" (Expand Search), "ct larger decrease" (Expand Search), "_ largest decrease" (Expand Search)
"ct marked decrease" » "ct marked increase" (Expand Search), "_ marked decrease" (Expand Search), "a marked decrease" (Expand Search), "n marked decrease" (Expand Search)
"ct levels increased" » "c levels increased" (Expand Search), "wt levels increased" (Expand Search), "cd levels increased" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("ct largest decrease") OR ("ct marked decrease"))) OR ("ct levels increased"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"ct largest decrease\") OR (\"ct marked decrease\"))) OR (\"ct levels increased\"))*".
• Removing quotes may allow a broader search: (((( ct largest decrease ) OR ( ct marked decrease ))) OR ( ct levels increased ))*.