Perhaps you should try some spelling variations:
"5 nn decrease" » "k nn decrease" (Expand Search), "_ nn decrease" (Expand Search), "5 nn decreased" (Expand Search), "5 nn increase" (Expand Search)
"50 pp decrease" » "50 pp decreased" (Expand Search), "50 pp increase" (Expand Search)
"5 fold decrease" » "5 fold decreased" (Expand Search), "5 fold increase" (Expand Search), "5 food decrease" (Expand Search), "5 old decrease" (Expand Search)
"50 i decrease" » "50 i decreased" (Expand Search), "50 i increase" (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: (("50 pp decrease") OR ((((("5 nn decrease") OR ("5 fold decrease"))) OR ("50 i decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 pp decrease\") OR (((((\"5 nn decrease\") OR (\"5 fold decrease\"))) OR (\"50 i decrease\"))))*".
• Removing quotes may allow a broader search: (( 50 pp decrease ) OR ((((( 5 nn decrease ) OR ( 5 fold decrease ))) OR ( 50 i decrease ))))*.