Perhaps you should try some spelling variations:
"5 ng decrease" » "5 _ decrease" (Expand Search), "5 n_ decrease" (Expand Search), "5 n_ decreased" (Expand Search), "5 n_ decreases" (Expand Search), "5 μg decrease" (Expand Search)
"50 ns decrease" » "50 _ decrease" (Expand Search)
"50 ms decrease" » "50 _ decrease" (Expand Search)
"5 g decrease" » "5 _ decrease" (Expand Search), "5 _ decreased" (Expand Search), "5 _ decreases" (Expand Search), "5 μg decrease" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("5 ng decrease") OR ("5 g decrease"))) OR ((("50 ns decrease") OR ("50 ms decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"5 ng decrease\") OR (\"5 g decrease\"))) OR (((\"50 ns decrease\") OR (\"50 ms decrease\"))))*".
• Removing quotes may allow a broader search: (((( 5 ng decrease ) OR ( 5 g decrease ))) OR ((( 50 ns decrease ) OR ( 50 ms decrease ))))*.