Perhaps you should try some spelling variations:
"_ we decrease" » "_ _ decrease" (Expand Search), "_ w_ decrease" (Expand Search), "_ w_ decreased" (Expand Search), "_ w_ decreases" (Expand Search), "_ web decrease" (Expand Search), "_ fe decrease" (Expand Search), "_ wt decrease" (Expand Search)
"50 a decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "5 a decrease" (Expand Search), "50 i decrease" (Expand Search)
"50 c decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "50 i decrease" (Expand Search)
"_ e decrease" » "_ _ decrease" (Expand Search), "_ _ decreased" (Expand Search), "_ _ decreases" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("50 a decrease") OR ("50 c decrease"))) OR ((("_ we decrease") OR ("_ e decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"50 a decrease\") OR (\"50 c decrease\"))) OR (((\"_ we decrease\") OR (\"_ e decrease\"))))".
• Removing quotes may allow a broader search: (((( 50 a decrease ) OR ( 50 c decrease ))) OR ((( _ we decrease ) OR ( _ e decrease )))).
• Adding a wildcard symbol may retrieve word variants: (((("50 a decrease") OR ("50 c decrease"))) OR ((("_ we decrease") OR ("_ e decrease"))))*.