Perhaps you should try some spelling variations:
"5 nn decrease" » "5 _ decrease" (Expand Search), "k nn decrease" (Expand Search), "_ nn decrease" (Expand Search)
"5 wt decrease" » "5 _ decrease" (Expand Search), "_ wt decrease" (Expand Search), "5 ht decrease" (Expand Search), "2 wt decrease" (Expand Search)
"10 a decrease" » "10 _ decrease" (Expand Search), "10 _ decreased" (Expand Search), "10 _ decreases" (Expand Search), "19 a decrease" (Expand Search), "10 i decrease" (Expand Search)
"1 a decrease" » "1 _ decrease" (Expand Search), "1 _ decreased" (Expand Search), "1 _ decreases" (Expand Search), "19 a 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 nn decrease\") OR (((((\"10 a decrease\") OR (\"1 a decrease\"))) OR (\"5 wt decrease\"))))~".
• Removing quotes may allow a broader search: (( 5 nn decrease ) OR ((((( 10 a decrease ) OR ( 1 a decrease ))) OR ( 5 wt decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (("5 nn decrease") OR ((((("10 a decrease") OR ("1 a decrease"))) OR ("5 wt decrease"))))*.