Perhaps you should try some spelling variations:
"50 ms decrease" » "50 ms decreased" (Expand Search), "50 ms increase" (Expand Search)
"_ e decrease" » "_ e decreased" (Expand Search), "_ e increase" (Expand Search)
"a rare decrease" » "a rare decreased" (Expand Search), "a rare increase" (Expand Search), "a rate decrease" (Expand Search), "a care decrease" (Expand Search)
"a case decrease" » "a case decreased" (Expand Search), "a case increase" (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 ms decrease") OR ((((("_ e decrease") OR ("a rare decrease"))) OR ("a case decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 ms decrease\") OR (((((\"_ e decrease\") OR (\"a rare decrease\"))) OR (\"a case decrease\"))))".
• Removing quotes may allow a broader search: (( 50 ms decrease ) OR ((((( _ e decrease ) OR ( a rare decrease ))) OR ( a case decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("50 ms decrease") OR ((((("_ e decrease") OR ("a rare decrease"))) OR ("a case decrease"))))*.