Perhaps you should try some spelling variations:
"10 ng decrease" » "10 nn decrease" (Expand Search), "10 we decrease" (Expand Search), "10 gy decreased" (Expand Search), "100 ng decrease" (Expand Search), "10 mg decrease" (Expand Search), "10 nm decrease" (Expand Search)
"50 a decrease" » "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "50 μ decrease" (Expand Search), "5 a decrease" (Expand Search), "0 a decrease" (Expand Search)
"50 c decrease" » "50 c decreased" (Expand Search), "50 rc decreased" (Expand Search), "50 _ decreased" (Expand Search), "5 c decrease" (Expand Search), "50 μ decrease" (Expand Search), "20 c 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: (("50 a decrease") OR ((((("50 c decrease") OR ("50 _ decrease"))) OR ("10 ng decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 a decrease\") OR (((((\"50 c decrease\") OR (\"50 _ decrease\"))) OR (\"10 ng decrease\"))))".
• Removing quotes may allow a broader search: (( 50 a decrease ) OR ((((( 50 c decrease ) OR ( 50 _ decrease ))) OR ( 10 ng decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("50 a decrease") OR ((((("50 c decrease") OR ("50 _ decrease"))) OR ("10 ng decrease"))))*.