Perhaps you should try some spelling variations:
"5 ng decrease" » "5 _ decrease" (Expand Search), "5 g decrease" (Expand Search), "5 μg decrease" (Expand Search)
"6 nm decrease" » "6 _ decrease" (Expand Search)
"_ we decrease" » "_ _ decrease" (Expand Search), "_ web decrease" (Expand Search), "_ e decrease" (Expand Search), "_ fe decrease" (Expand Search)
"_ eb decrease" » "_ _ decrease" (Expand Search), "_ web decrease" (Expand Search), "_ ebv decrease" (Expand Search), "_ ebm decrease" (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: "((((\"5 ng decrease\") OR (\"6 nm decrease\"))) OR (((\"_ we decrease\") OR (\"_ eb decrease\"))))~".
• Removing quotes may allow a broader search: (((( 5 ng decrease ) OR ( 6 nm decrease ))) OR ((( _ we decrease ) OR ( _ eb decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("5 ng decrease") OR ("6 nm decrease"))) OR ((("_ we decrease") OR ("_ eb decrease"))))*.