Perhaps you should try some spelling variations:
"5 ng decrease" » "5 _ decrease" (Expand Search), "5 g decrease" (Expand Search), "5 μg decrease" (Expand Search)
"5 we decrease" » "5 _ decrease" (Expand Search), "_ we decrease" (Expand Search)
"5 wt decrease" » "5 _ decrease" (Expand Search), "_ wt decrease" (Expand Search), "5 ht decrease" (Expand Search), "i wt decrease" (Expand Search)
"2 wt decrease" » "2 _ decrease" (Expand Search), "_ wt decrease" (Expand Search), "i wt decrease" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"5 ng decrease\") OR (((\"5 we decrease\") OR (((\"5 wt decrease\") OR (\"2 wt decrease\"))))))~".
• Removing quotes may allow a broader search: (( 5 ng decrease ) OR ((( 5 we decrease ) OR ((( 5 wt decrease ) OR ( 2 wt decrease ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("5 ng decrease") OR ((("5 we decrease") OR ((("5 wt decrease") OR ("2 wt decrease"))))))*.