Perhaps you should try some spelling variations:
degenerate nonlinear » general nonlinear (Expand search), degenerate quasilinear (Expand search)
decrease faster » decrease after (Expand search), decrease further (Expand search), decreased after (Expand search)
faster decrease » rate decrease (Expand search)
in degenerate » non degenerate (Expand search), _ degenerate (Expand search), of degenerate (Expand search)
decrease and » decreases and (Expand search), decrease of (Expand search), decrease the (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (Expand search)

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease faster decrease AND decrease ) OR ( decrease in degenerate nonlinear effects ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease faster decrease and decrease ) OR ( decrease in degenerate nonlinear effects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease faster decrease and decrease ) OR ( decrease in degenerate nonlinear effects ))*.