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