Perhaps you should try some spelling variations:
"10 ng decrease" » "10 _ decrease" (Expand Search), "100 ng decrease" (Expand Search), "10 μg decrease" (Expand Search)
"5 ht decrease" » "5 _ decrease" (Expand Search)
"2 wt decrease" » "2 _ decrease" (Expand Search), "_ wt decrease" (Expand Search), "i wt decrease" (Expand Search)
"_ e decrease" » "_ _ decrease" (Expand Search), "_ _ decreased" (Expand Search), "_ _ decreases" (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: "((\"10 ng decrease\") OR (((((\"5 ht decrease\") OR (\"2 wt decrease\"))) OR (\"_ e decrease\"))))~".
• Removing quotes may allow a broader search: (( 10 ng decrease ) OR ((((( 5 ht decrease ) OR ( 2 wt decrease ))) OR ( _ e decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (("10 ng decrease") OR ((((("5 ht decrease") OR ("2 wt decrease"))) OR ("_ e decrease"))))*.