Perhaps you should try some spelling variations:
"50 ppm decrease" » "50 _ decrease" (Expand Search)
"_ web decrease" » "_ _ decrease" (Expand Search)
"5 we decrease" » "5 _ decrease" (Expand Search), "_ we decrease" (Expand Search)
"10 i decrease" » "10 _ decrease" (Expand Search), "10 _ decreased" (Expand Search), "10 _ decreases" (Expand Search), "1 i decrease" (Expand Search), "16 i 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: (((("50 ppm decrease") OR ("10 i decrease"))) OR ((("5 we decrease") OR ("_ web decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"50 ppm decrease\") OR (\"10 i decrease\"))) OR (((\"5 we decrease\") OR (\"_ web decrease\"))))*".
• Removing quotes may allow a broader search: (((( 50 ppm decrease ) OR ( 10 i decrease ))) OR ((( 5 we decrease ) OR ( _ web decrease ))))*.