Perhaps you should try some spelling variations:
"_ fes decrease" » "_ _ decrease" (Expand Search), "_ fed decrease" (Expand Search), "_ es decrease" (Expand Search)
"5 ng decrease" » "5 _ decrease" (Expand Search), "5 g decrease" (Expand Search), "5 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)

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 ((((("_ fe decrease") OR ("_ fes decrease"))) OR ("i wt decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"5 ng decrease\") OR (((((\"_ fe decrease\") OR (\"_ fes decrease\"))) OR (\"i wt decrease\"))))".
• Removing quotes may allow a broader search: (( 5 ng decrease ) OR ((((( _ fe decrease ) OR ( _ fes decrease ))) OR ( i wt decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("5 ng decrease") OR ((((("_ fe decrease") OR ("_ fes decrease"))) OR ("i wt decrease"))))*.