Perhaps you should try some spelling variations:
"_ wt decrease" » "_ wet decrease" (Expand Search), "_ mt decrease" (Expand Search), "_ wt decreased" (Expand Search), "_ wt increase" (Expand Search)
"i el decrease" » "_ el decrease" (Expand Search), "i el decreased" (Expand Search), "i el increase" (Expand Search)
"50 ms decrease" » "50 ms decreased" (Expand Search), "50 ms increase" (Expand Search)
"_ six decrease" » "_ six decreased" (Expand Search), "_ six increase" (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: "((\"50 ms decrease\") OR (((\"_ wt decrease\") OR (((\"_ six decrease\") OR (\"i el decrease\"))))))~".
• Removing quotes may allow a broader search: (( 50 ms decrease ) OR ((( _ wt decrease ) OR ((( _ six decrease ) OR ( i el decrease ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("50 ms decrease") OR ((("_ wt decrease") OR ((("_ six decrease") OR ("i el decrease"))))))*.