Perhaps you should try some spelling variations:
"_ knn decrease" » "_ nn decrease" (Expand Search), "_ knn decreased" (Expand Search), "_ knn increase" (Expand Search)
"k nn decrease" » "k nn decreased" (Expand Search), "k nn increase" (Expand Search)
"b _ decrease" » "b _ decreased" (Expand Search), "b _ increase" (Expand Search)
"3d point decrease" » "3d point decreased" (Expand Search), "3d point 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: "((((\"k nn decrease\") OR (\"_ knn decrease\"))) OR (((\"b _ decrease\") OR (\"3d point decrease\"))))~".
• Removing quotes may allow a broader search: (((( k nn decrease ) OR ( _ knn decrease ))) OR ((( b _ decrease ) OR ( 3d point decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("k nn decrease") OR ("_ knn decrease"))) OR ((("b _ decrease") OR ("3d point decrease"))))*.