Perhaps you should try some spelling variations:
"_ fed decrease" » "_ _ decrease" (Expand Search), "_ feed decrease" (Expand Search), "_ ed decrease" (Expand Search)
"10 ng decrease" » "10 _ decrease" (Expand Search), "100 ng decrease" (Expand Search), "10 μg decrease" (Expand Search)
"_ fe decrease" » "_ _ decrease" (Expand Search), "_ e decrease" (Expand Search)
"i wt decrease" » "i _ decrease" (Expand Search), "_ wt decrease" (Expand Search), "i et decrease" (Expand Search), "2 wt decrease" (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: (("10 ng decrease") OR ((((("_ fe decrease") OR ("i wt decrease"))) OR ("_ fed decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"10 ng decrease\") OR (((((\"_ fe decrease\") OR (\"i wt decrease\"))) OR (\"_ fed decrease\"))))*".
• Removing quotes may allow a broader search: (( 10 ng decrease ) OR ((((( _ fe decrease ) OR ( i wt decrease ))) OR ( _ fed decrease ))))*.