Perhaps you should try some spelling variations:
"_ fed decrease" » "_ _ decrease" (Expand Search), "_ feed decrease" (Expand Search)
"5 ng decrease" » "5 _ decrease" (Expand Search), "5 g decrease" (Expand Search), "5 μg decrease" (Expand Search)
"5 nn decrease" » "5 _ decrease" (Expand Search), "k nn decrease" (Expand Search), "_ nn decrease" (Expand Search)
"_ e decrease" » "_ _ decrease" (Expand Search), "_ _ decreased" (Expand Search), "_ _ decreases" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("5 ng decrease") OR ("5 nn decrease"))) OR ((("_ e decrease") OR ("_ fed decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"5 ng decrease\") OR (\"5 nn decrease\"))) OR (((\"_ e decrease\") OR (\"_ fed decrease\"))))".
• Removing quotes may allow a broader search: (((( 5 ng decrease ) OR ( 5 nn decrease ))) OR ((( _ e decrease ) OR ( _ fed decrease )))).
• Adding a wildcard symbol may retrieve word variants: (((("5 ng decrease") OR ("5 nn decrease"))) OR ((("_ e decrease") OR ("_ fed decrease"))))*.