Perhaps you should try some spelling variations:
"100 ng decrease" » "100 _ decrease" (Expand Search), "100 nm decrease" (Expand Search), "10 ng decrease" (Expand Search), "100 mg decrease" (Expand Search)
"_ fe decrease" » "_ _ decrease" (Expand Search), "_ f_ decrease" (Expand Search), "_ f_ decreased" (Expand Search), "_ f_ decreases" (Expand Search)
"_ e decrease" » "_ _ decrease" (Expand Search), "_ _ decreased" (Expand Search), "_ _ decreases" (Expand Search)
"50 a decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "5 a decrease" (Expand Search), "50 i 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: (("100 ng decrease") OR ((((("_ e decrease") OR ("_ fe decrease"))) OR ("50 a decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"100 ng decrease\") OR (((((\"_ e decrease\") OR (\"_ fe decrease\"))) OR (\"50 a decrease\"))))".
• Removing quotes may allow a broader search: (( 100 ng decrease ) OR ((((( _ e decrease ) OR ( _ fe decrease ))) OR ( 50 a decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("100 ng decrease") OR ((((("_ e decrease") OR ("_ fe decrease"))) OR ("50 a decrease"))))*.