Perhaps you should try some spelling variations:
"20 means decrease" » "20 mean decrease" (Expand Search), "20 deaths decreased" (Expand Search), "20 meaa decrease" (Expand Search), "20 meawe decrease" (Expand Search), "20 meause decreased" (Expand Search), "_ means decrease" (Expand Search), "k means decrease" (Expand Search), "a means decrease" (Expand Search)
"50 nn decrease" » "50 a decrease" (Expand Search), "50 mean decrease" (Expand Search), "50 gy decreased" (Expand Search), "50 ng decrease" (Expand Search), "50 n decrease" (Expand Search), "59 nn decrease" (Expand Search)
"50 ns decrease" » "50 a decrease" (Expand Search), "50 we decrease" (Expand Search), "50 use decreased" (Expand Search), "50 ms 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 nn decrease") OR ("20 means decrease"))) OR ("50 ns decrease"))) OR ("50 _ decrease"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"50 nn decrease\") OR (\"20 means decrease\"))) OR (\"50 ns decrease\"))) OR (\"50 _ decrease\"))".
• Removing quotes may allow a broader search: (((((( 50 nn decrease ) OR ( 20 means decrease ))) OR ( 50 ns decrease ))) OR ( 50 _ decrease )).
• Adding a wildcard symbol may retrieve word variants: (((((("50 nn decrease") OR ("20 means decrease"))) OR ("50 ns decrease"))) OR ("50 _ decrease"))*.