Perhaps you should try some spelling variations:
"50 pp decrease" » "50 _ decrease" (Expand Search)
"_ nn decrease" » "_ _ decrease" (Expand Search), "_ ann decrease" (Expand Search), "_ cnn decrease" (Expand Search), "_ knn decrease" (Expand Search)
"5 nm decrease" » "5 _ decrease" (Expand Search), "6 nm decrease" (Expand Search)
"10 a decrease" » "10 _ decrease" (Expand Search), "10 _ decreased" (Expand Search), "10 _ decreases" (Expand Search), "19 a decrease" (Expand Search), "1 a decrease" (Expand Search)

Try widening your search to All Fields.

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 ((((("_ nn decrease") OR ("5 nm decrease"))) OR ("10 a decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 pp decrease\") OR (((((\"_ nn decrease\") OR (\"5 nm decrease\"))) OR (\"10 a decrease\"))))".
• Removing quotes may allow a broader search: (( 50 pp decrease ) OR ((((( _ nn decrease ) OR ( 5 nm decrease ))) OR ( 10 a decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("50 pp decrease") OR ((((("_ nn decrease") OR ("5 nm decrease"))) OR ("10 a decrease"))))*.