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