Perhaps you should try some spelling variations:
decrease faster » decrease after (Expand search), decrease further (Expand search), decreased after (Expand search)
faster decrease » rate decrease (Expand search)
decrease hard » decrease and (Expand search), decrease hiv (Expand search), decrease akt (Expand search)
hard problem » and problem (Expand search), old problem (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (Expand search)

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

• Removing quotes may allow a broader search: (( decrease faster decrease hard problem ) OR ( decrease NOT decrease to decrease ))~.