Perhaps you should try some spelling variations:
"5 nn decrease" » "5 _ decrease" (Expand Search), "5 a decrease" (Expand Search), "5 mean decrease" (Expand Search), "5 n_ decrease" (Expand Search), "5 na decrease" (Expand Search), "5 n_ decreased" (Expand Search), "5 non decrease" (Expand Search), "59 nn decrease" (Expand Search), "5 nm decrease" (Expand Search)
"10 we decrease" » "10 _ decrease" (Expand Search), "10 a decrease" (Expand Search), "10 mean decrease" (Expand Search), "1_ we decrease" (Expand Search), "10 re decrease" (Expand Search), "16 we decrease" (Expand Search)
"50 n decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 ns decrease" (Expand Search), "50 ng decrease" (Expand Search), "50 μ decrease" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("5 nn decrease") OR ((("50 n decrease") OR ("10 we decrease"))))~.
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• Removing quotes may allow a broader search: (( 5 nn decrease ) OR ((( 50 n decrease ) OR ( 10 we decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("5 nn decrease") OR ((("50 n decrease") OR ("10 we decrease"))))*.